实验三 类和对象

..

{

cout<<\圆柱的体积为：\ }

private:

double sur; //表面积 double vol; //体积 double height; //高 }; //圆锥

class cone:public circle {

public:

void in_rad() {

cout<<\输入圆锥半径：\ cin>>rad; }

void in_height() {

cout<<\输入圆锥高：\ cin>>height; }

void calc_sur() {

sur=0.5*PI*rad*rad*2*PI*rad*height; }

void calc_vol() {

vol=1/3.0*PI*rad*rad*height; }

void out_sur() {

cout<<\圆锥的表面积为：\ }

void out_vol() {

cout<<\圆锥的体积为：\ }

private:

double sur; //表面积 double vol; //体积 double height; };

int main()

c

..

{

cout<<\球：\ ball oball; oball.in_rad(); oball.calc_sur(); oball.calc_vol(); oball.out_sur(); oball.out_vol(); cout<

cout<<\圆柱：\ column ocol; ocol.in_rad(); ocol.in_height(); ocol.calc_sur(); ocol.calc_vol(); ocol.out_sur(); ocol.out_vol(); cout<

cout<<\圆锥：\ cone ocone; ocone.in_rad(); ocone.in_height(); ocone.calc_sur(); ocone.calc_vol(); ocone.out_sur(); ocone.out_vol(); cout<

运行结果： . .

c