#include <stdio.h>
#include <stdlib.h>
int main()
{
int inPut ;
int stuID[20], score[20]; // the number of students <= 20
int i;
for (i=0 ; i<20 ; i++)
{
stuID[i]=0;
score[i]=0;
}
i=0;
do{
system("CLS");
printf("enter %d th Student ID(ex:12345678): ", i+1);
scanf("%d", &stuID[i]);
printf("enter %d th score(0-100): ", i+1);
scanf("%d", &score[i]);
printf("enter [0] to end: ");
scanf("%d", &inPut);
i++;
} while(inPut != 0);
system("CLS");
printf("Student ID\tScore\n");
int num;
double sum=0, average=0;
for (num=0 ; num<i ; num++) //num=0
{
printf("%d\t%d\n", stuID[num], score[num]);
sum += score[num];
} //num=1
average = sum / num;
printf("\nthe sum is %.2lf\n", sum);
printf("the average is %.2lf\n\n", average);
system("pause");
return 0;
}