PAT IO-03 整数均值

 /*
 *PAT IO-02 整数四则运算
 *2015.7.30
 *作者:flx413
 */

 #include<stdio.h>
 int main()
 {
     int a[], sum;
     float average;
     scanf("%d%d%d%d", &a[], &a[], &a[], &a[]);
     sum = a[] + a[] + a[] + a[];
     average = sum / 4.0;
     printf("Sum = %d; Average = %.1f", sum, average);
     return ;
 }