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WA 原因WHY!WA 的!@
#include<iostream.h>
#include<stdio.h>
#include<math.h>
void main(){
int number,n;
double R,r,temp;
double re[10000];
cin>>number;
for(int i=1;i<=number;i++){
cin>>R>>n;
r=(sin(acos(-1)/n)*R)/(1+sin(acos(-1)/n));
re[i]=r;
}
for(i=1;i<=number;i++){
//printf("Scenario #%d:\n",i);
cout<< "Scenario #"<<i<<":"<<endl;
printf("%.3f\n\n",re[i]);
}
}
AC 的!@
#include<iostream.h>
#include<stdio.h>
//#define pi 3.14159265358979323846
#include<math.h>
void main(){
int number,n;
double R,r,temp;
double re[10000];
cin>>number;
for(int i=1;i<=number;i++){
cin>>R>>n;
r=(sin(acos(-1)/n)*R)/(1+sin(acos(-1)/n));
re[i]=r;
}
for(i=1;i<=number;i++){
printf("Scenario #%d:\n",i);
//cout<< "Scenario #"<<i<<":"<<endl;
printf("%.3f\n\n",re[i]);
}
}
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