64,282
社区成员
发帖
与我相关
我的任务
分享
#include <iostream>
unsing namespace std;
const float PI = 3.1416;
float fCir_L(float);
float fCir_S(float);
main(){
float r,l,s;
cout<<"R = ";
cin>>r;
l = fCir_L(r);
s = fCir_S(r);
cout<<"l = "<<l;
cout<<"\ns = "<<s<<endl;
}
float fCir_L(float x){
float z = -1.0;
if(x >= 0.0)
z = 2*PI*x;
return(z);
}
float fCir_S(float x){
float z = -1.0;
if(x >= 0.0)
z = PI*x*x;
return(z);
}