C++ Concatenation


Example

You can concatenate std::strings using the overloaded + and += operators. Using the + operator:

std::string hello = "Hello";
std::string world = "world";
std::string helloworld = hello + world; // "Helloworld"

Using the += operator:

std::string hello = "Hello";
std::string world = "world";
hello += world; // "Helloworld"

You can also append C strings, including string literals:

std::string hello = "Hello";
std::string world = "world";
const char *comma = ", ";
std::string newhelloworld = hello + comma + world + "!"; // "Hello, world!"

You can also use push_back() to push back individual chars:

std::string s = "a, b, ";
s.push_back('c'); // "a, b, c"

There is also append(), which is pretty much like +=:

std::string app = "test and ";
app.append("test"); // "test and test"