302班

求幾門課程的平均成績以及掛科的門數
#include <stdio.h>
int main(void)
{
  int number,i,grade;
  int gradeTotal=0;
  int failureCount=0;
  float average;

  printf("How many grades will you be entering?");
  scanf("%i",&number);

  for(i=1;i<=number;i++)
  {
   printf("Enter grade #%i: ",i);
   scanf("%i",&grade);

   gradeTotal=gradeTotal+grade;
   if(grade<65)
    ++failureCount;
  }

  average=(float)gradeTotal/number;
  printf("\nGrade average = %.2f\n",average);//這是個格式化字符串，保留兩位有效數字
  printf("Number of failures =%i\n",failureCount);

  return 0;
}