头文件(shape.h):
class Circle
{
public:
double calculate_perimeter( double radius);
double calculate_area( double radius);
private:
int radius;
};
{
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;
}
#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;
}
#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下编译命令:
g++ -o test.exe shape.cpp test.cpp
运行结果:
Please input radius of the circle:5
Circle Perimeter: 31.4159
Circle Area: 78.5397
如果我门把头文件放在某个draw目录下
在主程序include的路径需要修改一下
#include "draw/shape.h"
编译指令:
g++ -o test.exe draw/*.cpp test.cpp
