Header File 

string.h, mbstring.h 

Category 

Memory and String Manipulation Routines 

Prototype 

char *strrev(char *s); 

wchar_t *_wcsrev(wchar_t *s); 

unsigned char *_mbsrev(unsigned char *s); 

Description 

Reverses a string. 

strrev changes all characters in a string to reverse order, except the terminating null character. (For example, it would change string\0 to gnirts\0.) 

Return Value 

strrev returns a pointer to the reversed string. 

Example  

#include <string.h>
#include <stdio.h>
int main(void)
{
   char *forward = "string";
   printf("Before strrev(): %s\n", forward);
   strrev(forward);
   printf("After strrev():  %s\n", forward);
   return 0;
}

Portability