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WA 原因WHY!

Posted by 123456sb at 2007-08-15 22:41:39 on Problem 1799
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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