《C++ Primer Plus》3.7編程練習

題目

例一

int_tall.cpp–英呎英吋轉換，下劃線指示

//int_tall.cpp--英呎英吋轉換，下劃線指示//作者：黃子涵//日期：2016.10.25#include<iostream>using namespace std;int main(){    const Ft_in=12;    int in;    cout<<"請以英吋為單位輸入你的身高:__\b\b";    cin>>in;    cout<<"你的身高："<<in/Ft_in<<"英呎"<<in%Ft_in<<"英吋"<<endl;;    return 0;}

例二

BMI.cpp–體重指數

//BMI.cpp--體重指數//作者：黃子涵//日期：2016.10.25#include<iostream>using namespace std;int main(){    const double in_m=0.0254;    const double kg_b=2.2;    const int ft_in=12;    int ft,in;    double a,b,m,kg;    cout<<"請以幾英呎幾英吋輸入你的身高："<<endl;    cout<<"先輸入英呎："<<endl;    cin>>ft;    cout<<"再輸入英吋："<<endl;    cin>>in;    cout<<"請以磅輸入你的體重："<<endl;    cin>>b;    kg=b/kg_b;    m=(in+ft*ft_in)*in_m;    a=kg/(m*m);    cout<<"你的BMI是："<<a<<endl;    return 0;}

例三

d_m_s.cpp–度分秒

//d_m_s.cpp--度分秒//作者：黃子涵//日期：2016.10.25#include<iostream>using namespace std;int main(){    const int d_m=60;    const int m_s=60;    double d,m,s,a;    cout<<"請以度秒分輸入一個緯度："<<endl;    cout<<"先輸入度：";    cin>>d;    cout<<"再輸入分：";    cin>>m;    cout<<"最後輸入秒：";    cin>>s;    a=d+(m/d_m)+(s/m_s/d_m);    cout<<d<<"度"<<m<<"分"<<s<<"秒"<<"="<<a<<"度"<<endl;    return 0;}

例四

d_h_m_s.cpp–天小時分秒

//d_h_m_s.cpp--天小時分秒//作者：黃子涵//日期：2016.10.25#include<iostream>using namespace std;int main(){    const int d_h=24;    const int h_m=60;    const int m_s=60;    long s,sec;    int d,h,m,a;    cout<<"請秒數："<<endl;    cin>>s;    d=s/m_s/h_m/d_h;    sec=s-d*d_h*h_m*m_s;    h=sec/m_s/h_m;    sec=s-d*d_h*h_m*m_s-h*h_m*m_s;    m=sec/m_s;    a=s-d*d_h*h_m*m_s-h*h_m*m_s-m*m_s;    cout<<s<<"秒="<<d<<"天"        <<h<<"小時"<<m<<"分"<<a<<"秒"<<endl;    return 0;}

例五

population.cpp–show the percentage of US’populatian

//population.cpp--show the percentage of US'populatian//author:Huang Zihan//date:2016.10.25#include<iostream>using namespace std;int main(){    long long world,us;    double a;    cout<<"Enter the world's populatian:";    cin>>world;    cout<<"Enter the populatian of the US:";    cin>>us;    a=(double)us/(double)world*100.0;    cout<<"The populatian of the US is "<<a;    cout<<"% of the world's populatian"<<endl;    return 0;}

例六

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