cpp/C5/P5/C5-4.c

#include <stdio.h>
#define SUM 100000
int main()
{
  float amount,aver,total; 
  int i;
  for (i=1,total=0;i<=1000;i++)                      
  {
     printf("please enter amount:");
     scanf("%f",&amount);
     total= total+amount;                         
     if (total>=SUM) break;                                
  }
  aver=total/i;
  printf("num=%d\naver=%10.2f\n",i,aver);              
  return 0;
}