C++学习心得

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习题答案：2.7

5.

#include <iostream>

using namespace std;

void Fah();

int main()

{

  Fah();

  return 0;

}

void Fah()

{

           int Celsius;

           cout<<"Please enter a Celsius value:";

           cin>>Celsius;

           double Fahrenheit;

           Fahrenheit=1.8*Celsius+32.0;

           cout<<Celsius<<"degrees Celsius is"<<Fahrenheit<<"degrees Fahrenheit."<<endl;

           int i;

           cin>>i;

}

错误原因：没有在头文件中写申明//void Fah();

运行结果：

6.#include <iostream>

using namespace std;

void change();

int main()

{

  change();

  int i;

  cin>>i;

  return 0;

}

void change()

{

           double light;

           cout<<"Please enter the number of light years:";

           cin>>light;

           double ast;

           ast=63240*light;

           cout<<light<<"light years"<<ast<<"astronomical units."<<endl;

}

运行结果

7.#include <iostream>

using namespace std;

void see(int hours,int minutes)；//里面的参数将决定主函数中调用参数的个数

int main()

{

           cout<<"Enter the number of hours:";

           int hours;

           cin>>hours;

           cout<<"Enter the number of minutes：";

           int minutes;

           cin>>minutes;

           see(hours,minutes);

  int i;

  cin>>i;

  return 0;

}

void see(int hours,int minutes)

{

           cout<<"Time:"<<hours<<":"<<minutes;

}

C++学习心得

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原文地址：http://www.cnblogs.com/FFDC3EM/p/4790054.html