範例8-1 @ Quality of life is not what you get but what you become

//---------------------------------------------------------------------------
#include <iostream>
//---------------------------------------------------------------------------
int total;     // 全部的組合
int current;   // 使用者現在輸入的數值
int counter;   // 迴圈計數器

int main(int argc, char* argv[])
{
total = 0;

        counter = 0;
        while (counter < 5){
          std::cout << "Number? ";

std::cin >> current;
total += current;

          ++counter;
        }
        std::cout << "The grand total is " << total << '\n';
        std::system("pause");
        return 0;
}
//---------------------------------------------------------------------------

這個程式可用 for 敘述重寫，結果如範例 8-2。

題目來源：C++風格與藝術第二版 Steve Oualline 著黃吉霈編譯