题解 - 苏州市吴江区中学生信息编程竞赛域

2
12209水宇辰 (12209水宇辰) LV 9 @ 2021-11-12 16:24:22

#include<iostream>
#include<iomanip>
#include<cmath>
#include<stdio.h>
using namespace std;
int main()
{
float r1,r2,R;
scanf("%f%f",&r1,&r2);
R=1/(1/r1+1/r2);
printf("%.2f\n",R);
return 0;
}
-2
Prettygirl (12312王诺怡) LV 8 @ 2021-11-21 21:29:21

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
float r1,r2,R;
cin>>r1>>r2;
R=1/(1/r1+1/r2);
cout<<fixed<<setprecision(2)<<R;
return 0;
}
-2
12202顾灵韵 (12202顾灵韵) LV 6 @ 2021-11-19 16:18:33

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
float r1,r2,R;
cin>>r1>>r2;
R=1/(1/r1 + 1/r2);
cout<<fixed<<setprecision(2)<<R<<endl;
return 0;
}
-4
12203沈宇阳 (12203沈宇阳) LV 8 @ 2021-12-27 09:47:42

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
float r1,r2,R;
cin>>r1>>r2;
R=1/(1/r1 + 1/r2);
cout<<fixed<<setprecision(2)<<R<<endl;
return 0;
}
-4
12234洪子昊 (12234洪子昊) LV 8 @ 2021-12-13 20:25:23

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
float r1,r2,R;
cin>>r1>>r2;
R=1/(1/r1+1/r2);
cout<<fixed<<setprecision(2)<<R;
return 0;
}//注：这题只能用float