C++ Primer Plus 课后习题 第二章

//2-1
#include <iostream>
using namespace std;

int main(){
cout<<"Name:Kimiszc"<<endl;
cout<<"Address: Hangzhou Dianzi Univers，Hangzhou,Zhejiang ";
return 0;
}

//2-2
#include <iostream>
using namespace std;

double change(double x);

int main(){

double _long,_ma;
cout<<"请输入以long为单位的值"<<endl ;
cin>>_long;
_ma=change(_long);
cout<<"换算后的结果为"<<_ma<<"码";

}
double change(double x){
double y;
y=220*x;
return y;
}

//2-3
#include <iostream>
using namespace std;

void mFunction1();
void mFunction2();

int main(){
mFunction1();
mFunction2();
return 0;
}
void mFunction1(){
cout<<"Three blind mice"<<endl;
cout<<"Three blind mice"<<endl;
}

void mFunction2(){
cout<<"See how they run"<<endl;
cout<<"See how they run"<<endl;
}

//2-4
#include <iostream>
using namespace std;
int main(){
int age;
cout<<"请输入你的年龄"<<endl;
cin>>age;
cout<<"你的年龄是："<<age<<"岁，包含"<<age*12<<"个月"<<endl;
return 0;

}

//2-5
#include <iostream>
using namespace std;

double change(double n);
int main()  {
cout<<"please enter a Celsius valus:";
double n;
cin>>n;
cout<<n<<" degrees Celsius is "<<change(n)<<" degrees Fahrenheix"<<endl;
return 0;
}
double change(double n)  {

return (n*1.8+32.0);
}

//2-6
#include <iostream>
using namespace std;
double change(double y);
int main(){
double num;
cout<<"Enter the number of light years:";
cin>>num;
cout<<num<<" light years = "<<change(num)<<"astronomical units"<<endl;
}
double change(double y)
{
return y*62340;
}

//2-7
#include <iostream>
using namespace std;

void show(int hours,int minutes);
int main(){
int hours,minutes;
cout<<"Enter the number of hours:";
cin>>hours;
cout<<"Enter the number of minutes:";
cin>>minutes;
show(hours,minutes);
return 0;
}
void show(int hours,int minutes){
cout<<"Time: "<<hours<<" : "<<minutes<<endl;
}