Concatenate multiple strings in C++

This post will discuss how to concatenate multiple strings in C++.

1. Using `+` operator

The most common approach to concatenate multiple strings in C++ is to use the + operator, which is overloaded for string objects.

#include <iostream>

#include <string>

int main()

{

std::string s1("Hello");

std::string s2(" ");

std::string s3("World");

std::string s = s1 + s2 + s3;

std::cout << s;

return 0;

}

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Output:

Hello World

2. Using `std::stringstream` function

Another plausible way to concatenate multiple strings in C++ is to use string streams. The idea is to insert all individual strings into std::stringstream and then dump the buffer contents into a string using its str() function.

#include <iostream>

#include <string>

#include <sstream>

int main()

{

std::string s1("Hello");

std::string s2(" ");

std::string s3("World");

std::stringstream ss;

ss << s1 << s2 << s3;

std::string s = ss.str();

std::cout << s;

return 0;

}

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Output:

Hello World

3. Using `std::string::append` function

Finally, we can also use the string’s append() function that appends the specified string at the end of the string object.

#include <iostream>

#include <string>

#include <sstream>

int main()

{

std::string s1("Hello");

std::string s2(" ");

std::string s3("World");

std::string s;

s.append(s1);

s.append(s2);

s.append(s3);

std::cout << s;

return 0;

}

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Output:

Hello World

That’s all about concatenating multiple strings in C++.

Concatenate multiple strings in C++

1. Using + operator

2. Using std::stringstream function

3. Using std::string::append function

Share this:

1. Using `+` operator

2. Using `std::stringstream` function

3. Using `std::string::append` function