C++ primer plus第六版课后编程练习答案：7.2

#define  _CRT_SECURE_NO_WARNINGS 
#include <iostream>

void golf_score(int score[]);
void show_score(const int* show_score);
double average_score(const int* caculate_score);
int i;

int main()
{
    double average;
    using namespace std;

    int pscore[10];

    golf_score(pscore);
    show_score(pscore);
    cout << endl;
    average = average_score(pscore);
    cout << "The average is: " << average << endl;
}

void golf_score(int score[])
{
    for (i = 0; i < 10; i++)
    {
        std::cin >> score[i];
        if (std::cin.fail())
            break;
    }
}

void show_score(const int* show_score)
{
    std::cout << "The score are: ";
    for (int k = 0; k < i; k++)
        std::cout << show_score[k] << ',';
}

double average_score(const int* caculate_score)
{
    int sum = 0;
    for (int k = 0; k < i; k++)
        sum += caculate_score[k];
    return (sum / i);
}