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  1. #include <stdio.h>
  2.  
  3.  
  4.     void Ex(void *_ret, int ret_len, int choice){
  5.         if(choice==1){
  6.             int *ret = _ret;              
  7.             int i;
  8.             for(i=0; i<ret_len; i++){
  9.                 ret[i] = i;
  10.             }
  11.          } else {
  12.             int (*ret)[ret_len] = _ret;            
  13.             int i, j;
  14.             for(i=0; i<ret_len; i++){
  15.                 for(j=0; j<ret_len; j++){
  16.                     ret[i][j] = i*j;
  17.                 }
  18.             }
  19.          }
  20.     }
  21.  
  22.     int main(void) {
  23.         int first[10];
  24.         Ex(first, 10, 1);
  25.         int second[20][20];
  26.         Ex(second, 20, 2);
  27.  
  28.         printf("first[4] = %d\n", first[4]);
  29. 		printf("second[3][4] = %d\n", second[3][4]);
  30.  
  31.     }
Success #stdin #stdout 0s 9432KB
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stdin
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Standard input is empty
stdout
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first[4] = 4
second[3][4] = 12
https://ideone.com/Xt12zr
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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