C++ Primer Plus 代码学习解析（第三章 3.12-3.14）

3.12 modulus.cpp

#include <iostream>
int main()
{
    using namespace std;
    const int Lbs_per_stn = 14;
    int lbs;

    cout << "Enter your weight in pounds: ";
    cin >> lbs;
    int stone = lbs / Lbs_per_stn;      // whole stone
    int pounds = lbs % Lbs_per_stn;     // remainder in pounds
    cout << lbs << " pounds are " << stone
        << " stone, " << pounds << " pound(s).\n";

    return 0;
}

1. 该程序主要演示了除法的商和模，模就是余数
2. 在演示中1英石等于14磅，所以除数是14

3.13 assign.cpp

#include <iostream>
int main()
{
    using namespace std;
    cout.setf(ios_base::fixed, ios_base::floatfield);
    float tree = 3;     // int converted to float
    int guess = 3.9832; // float converted to int
    int debt = 7.2E12;  // result not defined in C++