C++編譯頭文件和多個cpp

頭文件(shape.h):

 
          class Circle 
          
{ 
          
 
          public: 
          
     
          double calculate_perimeter( 
          double radius); 
          
     
          double calculate_area( 
          double radius); 
          
 
          private: 
          
     
          int radius; 
          
}; 
         

 

shape.cpp:

           #include  
          " 
          shape.h 
          " 
          
 
          
 
          #define PI 3.14159 
          
 
          
 
          double Circle::calculate_perimeter( 
          double radius) 
          
{ 
          
     
          return  
          2 * PI * radius; 
          
} 
          
 
          
 
          double Circle::calculate_area( 
          double radius) 
          
{ 
          
     
          return PI * radius * radius; 
          
} 
         

 

主程序

test.cpp

           #include <iostream> 
          
#include  
          " 
          shape.h 
          " 
          
 
          
 
          using  
          namespace std; 
          
 
          
 
          int main() 
          
{ 
          
     
          int radius; 
          
     
          
    cout<<  
          " 
          Please input radius of the circle: 
          "; 
          
    cin>>radius; 
          
    Circle c; 
          
    cout <<  
          " 
          Circle Perimeter:  
          " << c.calculate_perimeter(radius) <<endl; 
          
    cout <<  
          " 
          Circle Area:  
          " << c.calculate_area(radius) <<endl; 
          
     
          return  
          0; 
          
} 
         

 

ubuntu下編譯命令:

g++ -o test.exe shape.cpp test.cpp

 

運行結果:

Please input radius of the circle:5
Circle Perimeter: 31.4159
Circle Area: 78.5397

 

如果我門把頭文件放在某個draw目錄下

在主程序include的路徑需要修改一下

#include "draw/shape.h"

 

編譯指令:

g++ -o test.exe draw/*.cpp test.cpp