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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int in_array(int val,int* x,int x_size) {
  5.   int i=0;
  6.   while( i<x_size ) {
  7.     if( *(x+i)==val ) return 1;
  8.     ++i;
  9.   }
  10.   return 0;
  11. }
  12.  
  13. int main() {
  14.   int x[] = {1,2,3,4,5,6,7,8,9,10};
  15.   int A[] = {3,4,5,6};
  16.   int B[] = {5,6,7,8};
  17.  
  18.   int *tmp = (int *)malloc(sizeof(x));
  19.   if(tmp){
  20.     int size=0,i=0;
  21.     for(i=0;i<sizeof(x)/sizeof(x[0]);++i) {
  22.       if( in_array(x[i],A,sizeof(A)/sizeof(A[0])) ||
  23.           in_array(x[i],B,sizeof(B)/sizeof(B[0])) ){
  24.         ++size;
  25.         *(tmp+i)=i;
  26.       }else{
  27.         *(tmp+i)=-1;
  28.       }
  29.     }
  30.  
  31.     int *array = (int *)malloc(size*sizeof(int));
  32.     if( array ){
  33.       int *pos=array;
  34.       for(i=0;i<sizeof(x)/sizeof(x[0]);++i) {
  35.         if( 0<=*(tmp+i) ){
  36.           *pos=x[*(tmp+i)];
  37.           pos++;
  38.         }
  39.       }
  40.       printf("[ ");
  41.       for(i=0;i<size;++i) printf("%d ", *(array+i));
  42.       printf("]\n");
  43.       free(array);
  44.     }
  45.     free(tmp);
  46.   }
  47.   return 0;
  48. }
  49.  
  50.  
Success #stdin #stdout 0s 9424KB
comments (?)
stdin 
Standard input is empty
stdout 
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https://ideone.com/YkmUdB
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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