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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. void reverse(char str[]) {
  5.     int len = strlen(str) ;
  6.     char tmp;
  7.     for (int i = len / 2; i >= 0; i--) {
  8.         tmp = str[i];
  9.         str[i] = str[len - i - 1];
  10.         str[len - i - 1] = tmp;
  11.     }
  12. }
  13.  
  14. int main(void) {
  15. 	char str[] = "123";
  16. 	reverse(str);
  17. 	printf("%s", str);
  18. }
  19.  
  20. //https://pt.stackoverflow.com/q/37031/101
Success #stdin #stdout 0s 9432KB
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stdin
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Standard input is empty
stdout
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321
https://ideone.com/2rr2yi
language:
C99 (gcc 8.3)
created:
6 years ago
visibility:
public

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