C++语言开发示例：03. 数据输入

#include <iostream>

const int Max = 5;
int main()
{
    using namespace std;
    double fish[Max];
    cout << "Please enter the weights of your fish.\n";
    cout << "You may enter up to " << Max
         << " fish <q to terminate>.\n";
    cout << "fish #1: ";
    int i = 0;
    while (i < Max && cin >> fish[i])
    {
        if (++i < Max)
            cout << "fish #" << i + 1 << ": ";
    }

    double total = 0.0;
    for (int j = 0; j < i; j++)
    {
        total += fish[j];
    }
    if (i == 0)
    {
        cout << "No fish\n";
    }
    else
    {
        cout << total / i << " = average weight of "
             << i << " fish\n";
    }
    cout << "Done.\n";
}