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  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. void swap(char *p, char *q) {
  5.     char temp[5];
  6.     memcpy(temp, p, sizeof(temp));
  7.     memcpy(p, q, sizeof(temp));
  8.     memcpy(q, temp, sizeof(temp));
  9. }
  10.  
  11. int main(void) {
  12.     char str[5][5] = {
  13.     	{'E', 'D', 'C', 'B', 'A'}
  14.     ,	{'F', 'G', 'H', 'I', 'J'}
  15.     , 	{'O', 'N', 'M', 'L', 'K'}
  16.     ,	{'P', 'Q', 'R', 'S', 'T'}
  17.     ,	{'Y', 'X', 'W', 'V', 'U'}
  18.     };
  19.     for (int i = 0 ; i != 5 ; i++ ) {
  20.         for (int j = 0; j != 5 ; j++)
  21.             printf("%c ", str[i][j]);
  22.         printf("\n");
  23.     }
  24.     printf("--------------\n");
  25.     swap(str[0], str[3]);
  26.     for (int i = 0 ; i != 5 ; i++ ) {
  27.         for (int j = 0; j != 5 ; j++)
  28.             printf("%c ", str[i][j]);
  29.         printf("\n");
  30.     }
  31. 	return 0;
  32. }
  33.  
Success #stdin #stdout 0s 2008KB
comments (?)
stdin 
Standard input is empty
stdout 
E D C B A 
F G H I J 
O N M L K 
P Q R S T 
Y X W V U 
--------------
P Q R S T 
F G H I J 
O N M L K 
E D C B A 
Y X W V U
https://ideone.com/GYEEHR
language:
C99 (gcc 8.3)
created:
11 years ago
visibility:
public

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