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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <stdbool.h>
  4.  
  5. bool is_zero(void* ptr,size_t elem_size) {
  6.     char* p = ptr;
  7.     for (int i=0;i<elem_size;i++,p++){
  8.         if (*p){
  9.             return false;
  10.         }
  11.     }
  12.     return true;
  13. }
  14.  
  15. void* clean_array(void* arr, int n, size_t elem_size) {
  16.     void * ptr2=NULL;
  17.     size_t j=0;
  18.     for(int i=0;i<n;i++){
  19.         if(is_zero(arr,elem_size)==0){
  20.             j++;
  21.             ptr2=realloc(ptr2,j*elem_size);
  22.             if(!ptr2)return NULL;
  23.             memcpy(ptr2+elem_size*(j-1),arr,elem_size);
  24.         }
  25.         arr+=elem_size;
  26.     }
  27.     return ptr2;
  28. }
  29.  
  30.  
  31. int main() {
  32.     int arr_int[] = {1,2,0};
  33.     int* int_cl = clean_array(arr_int,3,sizeof(int));
  34.     printf("%d,%d\n",int_cl[0],int_cl[1]);
  35.     free(int_cl);
  36. 	return 0;
  37. }
Success #stdin #stdout 0s 5304KB
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https://ideone.com/iCmimh
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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