Code:
/* Bai tap chuong 2 */
#include <iostream.h>
int dtduongtron(int r,float dt,float p)
{
p=3.14;
dt=r*r*p;
cout<<"Dien tich duong tron: "<<dt<<endl;
}
int cvduongtron(int r,float cv,float p)
{
p=3.14;
cv=2*p*r;
cout<<"Chu vi duong tron: "<<cv<<endl;
}
void main()
{
int cv,dt;
cout<<"\t===Bai tap dien tich===\n"<<endl;
cout<<"1.Tinh dien tich duong tron "<<endl;
cout<<"2.Tinh chu vi duong tron"<<endl;
cout<<"3.Exit"<<endl;
do
{
int tl;
cout<<"Su lua chon cua ban la: ";
cin>>tl;
switch(tl)
{
case 1:
{
float r,dt,p;
cout<<"Moi ban nhap ban kinh duong tron: ";cin>>r;
cout<<dtduongtron(r,dt,p)<<endl;
}
break;
case 2:
{
float cv,r,p;
cout<<"Moi ban nhap ban kinh duong tron: ";cin>>r;
cout<<cvduongtron(r,cv,p)<<endl;
}
break;
case 3:
cout<<"Exit";
exit(1);
}
}while (1);
return (1);
}
hiện ra số tào lao sau đáp án mọi người giúp em....thanks!