Информатика_1 / lab

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#include <math.h> 
void main()
{  
	 int a,q,p=0,i=0;
     int x[100];
 FILE *ft;
 FILE *fp;
 fp=fopen("D:\\out.txt ","rb");
 ft=fopen("D:\\ot.txt ","wb");
 if (fp==NULL) printf("mistake");
 else 
  {
   while (fscanf(fp,"%d",&x[i])!=EOF)
 {
     a=x[i];
    while(a!=0)
	{
		q=a%10;
		if((q/3==0) && (q!=0) && (q!=1))
		{
			fprintf(ft,"%d ",x[i]);
			p++;
		}
		a-=q;
		a/=10;
    }
	   i++;
   }
 }
printf("%d",p);
 fclose(fp);
  fclose(ft);
 getch();
}