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//---------------------------------------------------------------------------
/****************************************************************************
練習5-2：寫一個程式計算球體的體積，4/3πr³。                                *
****************************************************************************/
#include <iostream>

//---------------------------------------------------------------------------
float r;
const float PI = 3.1415926;

int main(int argc, char* argv[])
{
        std::cout << "Enter the radius value of ball:";
        std::cin >> r;
        std::cout << "The ball's valume is(4/3πr³):" << 4.0/3.0 * PI * (r*r*r)
                  << '\n';
        std::system("pause");
        return 0;
}
//---------------------------------------------------------------------------



題目來源：C++風格與藝術 第二版 Steve Oualline 著 黃吉霈 編譯
答案來源：自我撰寫(不保證正確喔)