【C++ Primer Plus 编程练习】 3.7

3.7.1

编写一个小程序，要求用户使用一个整数指出自己的身高（单位为英寸），然后将身高转换为英尺和英寸。该程序使用下划线字符来指示输入位置。另外，使用一个const符号常量来表示转换因子。

#include <iostream>
using namespace std;

int main()
{
    int a ;
    const int yinzi (12) ;
    cout << "你的身高:_____英寸。\b\b\b\b\b" ;
    cin >> a ;
    cout << "你的身高:" << a / yinzi << "英尺" << a % yinzi << "英寸。" << endl ;
}      

3.7.2

#include <iostream>
using namespace std;

int main()
{
    double foot , inch , pound , meter , kilo , bmi ;
    const double f2i (12.0) , i2m (0.0254) , k2p (2.2) ;
    cout << "Enter your height and weight:" << endl << "___feet\b\b\b\b\b\b" ;
    cin >> foot ;
    cout << "____inches\b\b\b\b\b\b\b\b\b" ;
    cin >> inch ;
    cout <<  "_____pounds\b\b\b\b\b\b\b\b\b\b" ;
    cin >> pound ;
    meter = i2m * ( f2i * foot  + inch ) ;
    kilo = pound / k2p ;
    bmi = kilo / ( meter * meter ) ;
    cout << "Your BMI is: " << bmi ;
}      

3.7.3

#include <iostream>
using namespace std;

int main()
{
    double d , m , s ;
    cout << "Enter a latitude in degrees, minutes, and seconds:" << endl ;
    cout << "First, enter the degrees: " ;
    cin >> d ;
    cout << "Next, enter the minutes of arc: " ;
    cin >> m ;
    cout << "Finally, enter the seconds of arc: " ;
    cin >> s ;
    cout << d << " degrees, " << m << " minutes, " << s << " seconds = "
        << d + m / 60.0 + s / 60.0 /60.0 << " degrees" ;
}      

3.7.4

#include <iostream>
using namespace std;

int main()
{
    long s , m , h , d ;
    const int ms (60) , hm (60) , dh (24) ;
    cout << "Enter the number of seconds: " ;
    cin >> s ;
    cout << s ;
    m = s / ms ;
    s %= ms ;
    h = m / hm ;
    m %= hm ;
    d = h / dh ;
    h %= dh ;
    cout << " seconds = "
        << d << " days, "
        << h << " hours, "
        << m << " minutes, "
        << s << " seconds" ;
}      

转载于:https://www.cnblogs.com/FZQL/archive/2013/05/17/3084030.html