7 条题解

  • 2
    @ 2023-7-20 9:31:07
    #include <iostream>
    using namespace std;
    const double PI = 3.14159;
    double r;
    int main()
    {
        cin >> r;
        printf("%.4lf\n", r * r * PI);
    }
    
    • 0
      @ 2023-9-23 21:20:03
      #include <stdio.h>
      int main(){
          // int 整数型,String 字符串型,float n 小数型,double 双精度型
          double r;
          double PI=3.14159;
          scanf("%lf",&r);
          printf("%.4f",r*r*PI);
          return 0;
      }
      
      • 0
        @ 2023-9-13 15:08:19
        #include<iostream>
        using namespace std;
        #include<iomanip>
        	int main(){
        	const	double p1=3.14159;
        	double r;
        	cin>>r;
        	cout<<fixed<<setprecision(4)<<p1*r*r<<endl;
        return 0;
        }
        
        • 0
          @ 2023-7-29 18:22:38
          import java.util.*;
          public class Main {
              public static void main(String[] args) {
                  Scanner in = new Scanner(System.in);
                  double r = in.nextDouble();
                  double pi = 3.14159;
                  double s = r * r * pi;
                  System.out.printf("%.4f", s);
              }
          }
          
          • 0
            @ 2022-9-17 16:49:11

            #include<stdio.h>

            #define pi 3.14159

            int main(){

            double r;

            scanf("%lf",&r);

            printf("%.4lf",rrpi);

            return 0;

            }

            • 0
              @ 2022-9-14 9:50:50
              #include<iostream>
              using namespace std;
              #include <cstdio>
              int main() {
                  double r;
                  const double PI = 3.14159;
                  cin >> r;
                  double val = PI * r * r;
                  printf("%.4f", val);
              }
              
              • -1
                @ 2022-9-18 11:51:37
                #include <stdio.h> 
                int main()
                {
                	double a,c;
                	scanf("%lf",&a);
                	c=a*a*3.14159;
                	printf("%.4lf",c);
                	
                	
                	return 0;
                 } 
                
                • 1

                信息

                ID
                9
                时间
                1000ms
                内存
                128MiB
                难度
                8
                标签
                递交数
                12066
                已通过
                2282
                上传者