//f7.c -- by tsaiwn@csie.nctu.edu.tw
#include <stdio.h>
int x, k;
long sum;
int main( ) {
   FILE* fp;
   fp=freopen("in.txt", "rt", stdin);  // §ï±q in.txt Ū
   if(fp==0) { perror("Open error."); exit(38); }
   sum = k=0;
   printf("x=? ");
   scanf("%d", &x);
   while( !feof(stdin) ) {
      printf("Got %d\n", x);
      ++k;  // count
      sum += x;
      printf("x=? ");
      scanf("%d", &x);
   }
   printf("Total %d numbers. Sum=%d\n", k, sum);
   return 0;
}