std::strcat

Header: <cstring>

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.

# Declarations

char* strcat( char* dest, const char* src );

# 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

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

# See also

• strncat
• strcpy
• C documentation