std::strcat

 

C++

Language

Standard library headers

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Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Strings library

Null-terminated strings

Byte strings

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Classes

basic_string

basic_string_view (C++17)

char_traits

 

Null-terminated byte strings

Functions
Character manipulation
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
Conversions to numeric formats
atof atoiatolatoll strtolstrtoll	strtoulstrtoull strtofstrtodstrtold strtoimaxstrtouimax (C++11)(C++11)
String manipulation
strcpy
strncpy
strcat
strncat
strxfrm
String examination
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
Memory manipulation
memchr
memcmp
memset
memcpy
memmove
Miscellaneous
strerror

 

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

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)
C documentation for strcat