C++ Program to Concatenate Two Strings

In this tutorial you will learn about the C++ Program to Concatenate Two Strings and its application with practical example.

In this tutorial, we will learn to create a C++ program that will Concatenate Two Strings in C++ programming.

Table Of Contents−

C++ Program to Concatenate Two Strings

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.

Basic Input and Output function in C++ Programming.
Basic C++ programming.
Using Strings in C++ Programming.

Algorithm:-

1. Declaring the variables for the program.

2. Taking input string 1 and 2 from the user. 

3. Concatinating the string from the taken variable.

4. Printing the result string.

5. End

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						1. Declaring the variables for the program.
 
2. Taking input string 1 and 2 from the user. 
 
3. Concatinating the string from the taken variable.
 
4. Printing the result string.
 
5. End

Program to Concatenate Two Strings

Concatenation means to join two values i.e. Strings. In strings, only one variable is declared which can store a sentence. It’s a collection of characters, digits, and Special characters. First will take the input string one from the user. Then we will take a second-string from the user and now we will concatenate that two stings.

Using the below program example.

Program Code:-

#include <iostream>  
using namespace std;  
int main ()  
{  
    //declaring the variables for the program
    string str1, str2, result; // declaring the string variables  
    int i;  //declaring the integer variables
    
    //taking input string1 from the user 
    cout <<"  Enter the first string: ";  
    cin >> str1; // take string1
    //taking input string2 from the user
    cout << "  Enter the second string: ";  
    cin >> 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 result   
    }   
    // use for loop to enter the characters of the str2 into result string   
    for ( i = 0; i < str2.size(); i++)  
    {  
    result = result + str2[i]; // add character of the str2 into result   
    }  
    cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;  
    return 0;  
}

#include <iostream>

using namespace std;

int main ()

{

//declaring the variables for the program

string str1, str2, result; // declaring the string variables

int i; //declaring the integer variables

//taking input string1 from the user

cout <<" Enter the first string: ";

cin >> str1; // take string1

//taking input string2 from the user

cout << " Enter the second string: ";

cin >> 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 result

}

// use for loop to enter the characters of the str2 into result string

for ( i = 0; i < str2.size(); i++)

{

result = result + str2[i]; // add character of the str2 into result

}

cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

str1 = it will hold the string value.
str2 = it will hold the string value.
result = it will hold the string value.

i = it will hold the integer value.

Taking Input string from the user for copying the string.

Concatenating the strings taken from the user with the help of the for loop.

Printing the output Concatenated String.

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C++ Program to Concatenate Two Strings