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  1. #include <stdio.h>
  2. void swap(int *a, int *b)
  3. {
  4.     int tmp = *a;
  5.     *a =  *b;
  6.     *b = tmp;
  7. }
  8. int length(char s[])
  9. {
  10.     int i = 0;
  11.     while (s[i] != NULL)
  12.         ++i;
  13.     return i - 1;
  14. }
  15. int main()
  16. {
  17.     char s[100];
  18.     fflush(stdin);
  19.     scanf("%s",s);
  20.     int n=length(s);
  21.     for(int i=0;i<=n/2;i++)
  22.     {
  23.         swap(&s[i],&s[n-i-1]);
  24.     }
  25.     for(int i=0;i<n;i++)
  26.     {
  27.         printf("%c",s[i]);
  28.     }
  29.     return 0;
  30. }
  31.  
Success #stdin #stdout 0s 5420KB
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https://ideone.com/Wzgz12
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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