NAME¶

std::strcat - std::strcat

Synopsis¶

Defined in header <cstring>
char *strcat( char *dest, const char *src );

Appends a copy of the character string pointed to by src to the end of the character
string pointed to by dest. The character src[0] replaces the null terminator at the
end of dest. The resulting byte string is null-terminated.

The behavior is undefined if the destination array is not large enough for the
contents of both src and dest and the terminating null character.

The behavior is undefined if the strings overlap.

Parameters¶

dest - pointer to the null-terminated byte string to append to
src - pointer to the null-terminated byte string to copy from

Return value¶

dest

Notes¶

Because strcat needs to seek to the end of dest on each call, it is inefficient to
concatenate many strings into one using strcat.

Example¶

// Run this code

#include <cstring>
#include <cstdio>

int main()
{
char str[50] = "Hello ";
char str2[50] = "World!";
std::strcat(str, str2);
std::strcat(str, " Goodbye World!");
std::puts(str);
}

Output:¶

Hello World! Goodbye World!

See also¶

strncat concatenates a certain amount of characters of two strings
(function)
strcpy copies one string to another
(function)