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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. char *reversestring(char *s)
  6. {
  7.     char *ps = s, *pe = s + strlen(s) - 1;
  8.     while (ps <  pe)
  9.     {
  10.         char ch = *pe;
  11.         *pe-- = *ps;
  12.         *ps++ = ch;
  13.     }
  14.     return s;
  15. }
  16.  
  17. int main(int argc, char *argv[])
  18. {
  19.     char str[] = "Hello, World!";
  20.     printf("%s\n", reversestring(str));
  21.     return 0;
  22. }
  23.  
Success #stdin #stdout 0s 1832KB
comments (?)
stdin 
Standard input is empty
stdout 
!dlroW ,olleH
https://ideone.com/4SP8iN
language:
C99 (gcc 8.3)
created:
13 years ago
visibility:
public

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