程式碼：

#include<iostream>

using namespace std;

int sum(int a, int b, int c)

{

return a + b + c;

}

int average(int a, int b, int c)

{

return (a + b + c) / 3;

}

void main()

{

int i;int a[5],b[5],c[5];

for (i = 0; i < 5; i++)

{

cout << "請輸入第"<<i+1<<"位語數外三門成績：" << endl;

cin >> a[i]>>b[i]>>c[i];

cout << "語數外三門總成績：" << sum(a[i], b[i], c[i]) << " 平均：" << average(a[i], b[i], c[i]) << endl;

}

}