用c++计算圆柱体的体积，底圆的面积和周长-创新互联

#include

#include

#define PI 3.1415926

using namespace std;

class Cylinder

{

private:

float r,h;

public:

Cylinder(float,float);

float perimeter(); //底圆周长 

float circleArea(); //底圆面积 

float volume(); //圆柱体体积 

float getH();

};

Cylinder::Cylinder(float num1,float num2)

{

r=num1;

h=num2;

}

float Cylinder::perimeter()

{

return 2*PI*r;

}

float Cylinder::circleArea()

{

return PI*pow(r,2);

}

float Cylinder::volume()

{

return circleArea()*h;

}

float Cylinder::getH()

{

return h;

}

//计算圆柱体表面积 

float cylinderArea(float r,float h)

{

Cylinder cy=Cylinder(r,h);

float perimeter=cy.perimeter(); //底圆周长 

float circleArea=cy.circleArea(); //底圆面积

float output;

output=circleArea*2;

output+=perimeter*cy.getH();

return output; 

}

//计算圆柱体体积 

float volume(float r,float h)

{

Cylinder cy=Cylinder(r,h);

return cy.volume();

}

int main()

{

Cylinder cy=Cylinder(1,10);

cout<<"底圆周长:"<

<<"\t圆柱体体积"<

cout<<"================="<

cout<<"cylinderArea(float r,float h):"<

<<"\tvolume(float r,float h):"<

}

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