Esta sección discutirá la concatenación de dos o más cadenas en el lenguaje de programación C++. La concatenación de la cadena significa el grupo de caracteres que combina dos cadenas más para devolver una única cadena concatenada. Mientras se concatenan las cadenas, la segunda cadena se agrega al final de la primera cadena para formar una sola cadena.

Por ejemplo, tenemos dos cadenas, ' Java ' y ' punto t ', y queremos concatenar para formar una sola cadena como Java + Tpoint = JavaTpoint.

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Analicemos las diferentes formas de concatenar la cadena dada en el lenguaje de programación C++.

1. Concatenar dos cadenas usando el bucle for
2. Concatenar dos cadenas usando el bucle while
3. Concatenar dos cadenas usando el operador +
4. Concatenar dos cadenas usando la función strcat()
5. Concatenar dos cadenas usando la función append()
6. Concatenar dos cadenas usando herencia
7. Concatenar dos cadenas usando la función amiga y la función strcat()

Programa para concatenar dos cadenas usando bucle for

Consideremos un ejemplo para combinar dos cadenas usando un bucle for en la programación C++.

Programa.cpp

 #include using namespace std; int main () { string str1, str2, result; // declare string variables int i; cout &lt;&gt; str1; // take string cout &lt;&gt; str2; // take second string // use for loop to enter the characters of the str1 into result string for ( i = 0; i <str1.size(); i++) { result="result" + str1[i]; add character of the str1 into } use for loop to enter characters str2 string ( i="0;" < str2.size(); str2[i]; cout << ' concatenation and is <<result; return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The Concatenation of the string Java and Tpoint is JavaTpoint </pre> <h3>Program to concatenate two strings using while loop</h3> <p>Let&apos;s consider an example to combine two strings using a while loop in C++ programming.</p> <p> <strong>Program2.cpp</strong> </p> <pre> #include using namespace std; int main () { // declare and initialize the string char str1[100] = &apos; We Love&apos;; char str2[100] = &apos; C++ Programming Language&apos;; int i, j; // declare variable cout &lt;&lt; &apos; The first string is: &apos; &lt;&lt; str1 &lt;&lt; endl; cout &lt;&lt; &apos; The second string is: &apos;&lt;&lt; str2 &lt;<endl; for (i="0;" str1[i] !="" ; i++); j="0;" initialize with 0; use while loop that insert the str2 characters in str1 (str2[j] ) check is not equal to null { assign character of i++; j++; } cout << ' concatenated string is: str1; return < pre> <p> <strong>Output</strong> </p> <pre> The first string is: We Love The second string is: C++ Programming Language The concatenated string is: We Love C++ Programming Language </pre> <h3>Program to concatenate two strings using the + operator in C++</h3> <p> <strong>+ Operator:</strong> It is an arithmetic &apos;+&apos;operator that simply adds two strings to return a new concatenated string.</p> <p>Let&apos;s consider an example to combine two strings using the + operator in C++ programming.</p> <p> <strong>Program3.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2; // declare string variables cout &lt;&gt; str1; cout &lt;&gt; str2; // use &apos;+&apos; operator to concatenate the str1 and str2 string result = str1 + str2; cout &lt;&lt; &apos; The concatenated string &apos; &lt;&lt; str1 &lt;&lt; &apos; and &apos; &lt;&lt; str2 &lt;<' is: ' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let&apos;s consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = &apos; We love&apos;; char str2[] = &apos; C++ Programming&apos;; cout &lt;&lt; &apos; String 1: &apos; &lt;<str1 <<endl; cout << ' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let&apos;s consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout &lt;&gt; str1; // take string cout &lt;&gt; str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout &lt;&lt; &apos; 
 The concatenation of the string is: &apos;&lt;&lt; str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let&apos;s consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &amp;str1, string &amp;str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &amp;str1, string &amp;str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout &lt;&gt;str1; cout &lt;&gt;str2; // create string object derive obj; // print string cout &lt;<' 
 the concatenated string is: ' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let&apos;s consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout &lt;<' 100 enter the first string: '; cin.getline (st, 100); take a line of string with limit cout <<' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated ' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></'></pre></'></pre></str1></pre></'></pre></endl;></pre></str1.size();>

Programa para concatenar dos cadenas usando el bucle while.

Consideremos un ejemplo para combinar dos cadenas usando un bucle while en programación C++.

Programa2.cpp

 #include using namespace std; int main () { // declare and initialize the string char str1[100] = &apos; We Love&apos;; char str2[100] = &apos; C++ Programming Language&apos;; int i, j; // declare variable cout &lt;&lt; &apos; The first string is: &apos; &lt;&lt; str1 &lt;&lt; endl; cout &lt;&lt; &apos; The second string is: &apos;&lt;&lt; str2 &lt;<endl; for (i="0;" str1[i] !="" ; i++); j="0;" initialize with 0; use while loop that insert the str2 characters in str1 (str2[j] ) check is not equal to null { assign character of i++; j++; } cout << \' concatenated string is: str1; return < pre> <p> <strong>Output</strong> </p> <pre> The first string is: We Love The second string is: C++ Programming Language The concatenated string is: We Love C++ Programming Language </pre> <h3>Program to concatenate two strings using the + operator in C++</h3> <p> <strong>+ Operator:</strong> It is an arithmetic &apos;+&apos;operator that simply adds two strings to return a new concatenated string.</p> <p>Let&apos;s consider an example to combine two strings using the + operator in C++ programming.</p> <p> <strong>Program3.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2; // declare string variables cout &lt;&gt; str1; cout &lt;&gt; str2; // use &apos;+&apos; operator to concatenate the str1 and str2 string result = str1 + str2; cout &lt;&lt; &apos; The concatenated string &apos; &lt;&lt; str1 &lt;&lt; &apos; and &apos; &lt;&lt; str2 &lt;<\' is: \' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let&apos;s consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = &apos; We love&apos;; char str2[] = &apos; C++ Programming&apos;; cout &lt;&lt; &apos; String 1: &apos; &lt;<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let&apos;s consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout &lt;&gt; str1; // take string cout &lt;&gt; str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout &lt;&lt; &apos; 
 The concatenation of the string is: &apos;&lt;&lt; str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let&apos;s consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &amp;str1, string &amp;str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &amp;str1, string &amp;str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout &lt;&gt;str1; cout &lt;&gt;str2; // create string object derive obj; // print string cout &lt;<\' 
 the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let&apos;s consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout &lt;<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1></pre></\'></pre></endl;>

Programa para concatenar dos cadenas usando el operador + en C++

+ Operador: Es un operador aritmético '+' que simplemente suma dos cadenas para devolver una nueva cadena concatenada.

Consideremos un ejemplo para combinar dos cadenas usando el operador + en programación C++.

Programa3.cpp

 #include using namespace std; int main () { string str1, str2; // declare string variables cout &lt;&gt; str1; cout &lt;&gt; str2; // use &apos;+&apos; operator to concatenate the str1 and str2 string result = str1 + str2; cout &lt;&lt; &apos; The concatenated string &apos; &lt;&lt; str1 &lt;&lt; &apos; and &apos; &lt;&lt; str2 &lt;<\' is: \' << result; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Java Enter the second string: Tpoint The concatenated string Java and Tpoint is: JavaTpoint </pre> <h3>Program to concatenate two strings using the strcat() method</h3> <p> <strong>strcat() function:</strong> The strcat is an inbuilt function of the string class, which adds two character strings to return a concatenated string.</p> <p> <strong>Syntax</strong> </p> <pre> strcat ( char *arr1, char *arr2) </pre> <p>There are two character arrays in the above syntax, arr1 and arr2, which passed inside the strcat() function to return a concatenated string.</p> <p>Let&apos;s consider an example to combine two strings using strcat() function in the C++ programming.</p> <p> <strong>Program4.cpp</strong> </p> <pre> #include #include using namespace std; int main() { // declare and initialize the string char str1[] = &apos; We love&apos;; char str2[] = &apos; C++ Programming&apos;; cout &lt;&lt; &apos; String 1: &apos; &lt;<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let&apos;s consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout &lt;&gt; str1; // take string cout &lt;&gt; str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout &lt;&lt; &apos; 
 The concatenation of the string is: &apos;&lt;&lt; str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let&apos;s consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &amp;str1, string &amp;str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &amp;str1, string &amp;str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout &lt;&gt;str1; cout &lt;&gt;str2; // create string object derive obj; // print string cout &lt;<\' 
 the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let&apos;s consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout &lt;<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1></pre></\'>

Programa para concatenar dos cadenas usando el método strcat()

Función strcat(): strcat es una función incorporada de la clase string, que agrega dos cadenas de caracteres para devolver una cadena concatenada.

Sintaxis

 strcat ( char *arr1, char *arr2) 

Hay dos matrices de caracteres en la sintaxis anterior, arr1 y arr2, que se pasan dentro de la función strcat() para devolver una cadena concatenada.

Consideremos un ejemplo para combinar dos cadenas usando la función strcat() en la programación C++.

Programa4.cpp

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 #include #include using namespace std; int main() { // declare and initialize the string char str1[] = &apos; We love&apos;; char str2[] = &apos; C++ Programming&apos;; cout &lt;&lt; &apos; String 1: &apos; &lt;<str1 <<endl; cout << \' string 2: <<str2 use the strcat() function to concatenate strcat(str1, str2); concatenated is: <<str1; return 0; } < pre> <p> <strong>Output</strong> </p> <pre> String 1: We love String 2: C++ Programming The concatenated string is: We love C++ Programming </pre> <h3>Program to concatenate two strings using the append function</h3> <p> <strong>append() function:</strong> An <strong>append()</strong> function is a predefined library function used to insert or add a second string at the end of the first string to return a single string.</p> <p> <strong>Syntax</strong> </p> <pre> str1.append(str2); </pre> <p>In the above syntax, the str2 is a second string to pass in the append() function that inserts the str2 string at the end of the str1 string.</p> <p>Let&apos;s consider an example to combine two strings using append() function in the C++ programming.</p> <p> <strong>Program5.cpp</strong> </p> <pre> #include using namespace std; int main () { string str1, str2, result; // declare string variables cout &lt;&gt; str1; // take string cout &lt;&gt; str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout &lt;&lt; &apos; 
 The concatenation of the string is: &apos;&lt;&lt; str1; return 0; } </pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! </pre> <h3>Program to concatenate two string using the inheritance of the class</h3> <p>Let&apos;s consider an example to combine two strings using inheritance in the C++ programming.</p> <p> <strong>Program6.cpp</strong> </p> <pre> #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &amp;str1, string &amp;str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &amp;str1, string &amp;str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout &lt;&gt;str1; cout &lt;&gt;str2; // create string object derive obj; // print string cout &lt;<\' 
 the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let&apos;s consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout &lt;<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'></pre></str1>

Programa para concatenar dos cadenas usando la función append

función agregar(): Un adjuntar() La función es una función de biblioteca predefinida que se utiliza para insertar o agregar una segunda cadena al final de la primera cadena para devolver una sola cadena.

Sintaxis

 str1.append(str2); 

En la sintaxis anterior, str2 es una segunda cadena para pasar en la función append() que inserta la cadena str2 al final de la cadena str1.

Consideremos un ejemplo para combinar dos cadenas usando la función append() en la programación C++.

Programa5.cpp

 #include using namespace std; int main () { string str1, str2, result; // declare string variables cout <> str1; // take string cout <> str2; // take second string // use append() function to insert element at the end of the str1 str1.append(str2); cout << ' 
 The concatenation of the string is: '<< str1; return 0; } 

Producción

 Enter the first string: Hello Enter the second string: Friends! The concatenation of the string is: HelloFriends! 

Programa para concatenar dos cadenas usando la herencia de la clase.

Consideremos un ejemplo para combinar dos cadenas usando herencia en la programación C++.

Programa6.cpp

 #include #include using namespace std; // create base class class base { protected: virtual string concatenate(string &amp;str1, string &amp;str2) = 0; }; // create derive class to acquire features of base class class derive: protected base { public: string concatenate (string &amp;str1, string &amp;str2) { string temp; temp = str1 + str2; return temp; } }; int main() { // declare variable string str1, str2; cout &lt;&gt;str1; cout &lt;&gt;str2; // create string object derive obj; // print string cout &lt;<\' 
 the concatenated string is: \' << obj.concatenate (str1, str2); return 0; } < pre> <p> <strong>Output</strong> </p> <pre> Enter first string: C++ Enter second string: Programming The concatenated string is: C++Programming </pre> <h3>Program to concatenate two strings using the friend function and strcat() function</h3> <p>Let&apos;s consider an example to combine two strings using friend function and strcat() function in the C++ programming.</p> <p> <strong>Program7.cpp</strong> </p> <pre> #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout &lt;<\' 100 enter the first string: \'; cin.getline (st, 100); take a line of string with limit cout <<\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\'></pre></\'>

Programa para concatenar dos cadenas usando la función amigo y la función strcat()

Consideremos un ejemplo para combinar dos cadenas usando la función amiga y la función strcat() en la programación C++.

Programa7.cpp

 #include #include using namespace std; class Base { private: char st[100], st2[100]; public: void inp() { cout &lt;<\\' 100 enter the first string: \\'; cin.getline (st, 100); take a line of string with limit cout <<\\' second (st2, friend void myfun(base b); }; myfun (base b) { strcat (b.st, b.st2); pass parameter to concatenate concatenated \\' < <b.st; } int main() base b; create b as an object b.inp(); call inp() function myfun(b); myfun() print return 0; pre> <p> <strong>Output</strong> </p> <pre> Enter the first string: javatpoint Enter the second string: .com The concatenated string: javatpoint.com </pre> <hr></\\'>