//2.7.1
# include <iostream>
int main()
{
using namespace std;
cout << "Xingming"<<endl;
cout <<"address"<<endl;
return 0;
}
//2.7.2
# include <iostream>
int main()
{
using namespace std;
int ilong;
int ma;
cout<<"enter the length in ilong:";
cin>>ilong;
ma=ilong*220;
cout<<ma<<"ma"<<endl;
return 0;
}
//2.7.3
# include <iostream>
using namespace std;
void f1();
void f2();
int main()
{
f1();
cout<<endl;
f1();
cout<<endl;
f2();
cout<<endl;
f2();
cout<<endl;
return 0;
}
void f1()
{
cout<<"Three blind mice";
}
void f2()
{
cout<<"See how they run";
}
//2.7.4
# include <iostream>
using namespace std;
int mouth_year(int n);
int main()
{
cout<<"Enter your age:";
int age;
cin>>age;
int mouth;
mouth=mouth_year(age);
cout<<"There are "<<mouth<<" mouths."<<endl;
return 0;
}
int mouth_year(int n)
{
return 12*n;
}
//2.7.5
# include <iostream>
using namespace std;
int change(int n);
int main()
{
cout<<"Please enter a Celsius value :";
int Celsius;
cin>>Celsius;
int Fahrenheit;
Fahrenheit=change(Celsius);
cout <<Celsius<<" degree Celsius is "<<Fahrenheit<<" degree Fahrenheit"<<endl;
return 0;
}
int change(int n)
{
return 1.8*n+32;
}
//2.7.6
# include <iostream>
using namespace std;
double change(double n);
int main()
{
cout <<"Enter the number of light years:";
double light_year;
cin>>light_year;
double unit;
unit=change(light_year);
cout<<light_year<<" light_year = "<< unit <<" astronomical units"<<endl;
return 0;
}
double change(double n)
{
return 63240*n;
}
//2.7.7
# include <iostream>
using namespace std;
int main()
{
cout << "Enter the number of hours:";
int hour;
cin>>hour;
cout << "Enter the number of minutes:";
int minutes;
cin>>minutes;
cout<<"Time "<<hour <<" : "<< minutes<<endl;
return 0;
}
C++ Primer Plus 习题答案 第二章
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转载自blog.csdn.net/weixin_40473591/article/details/81104500
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