Algorithm
URI Problem 1002 Online Link - https://www.urionlinejudge.com.br/judge/en/problems/view/1002
Algorithm -
We know Pi = 3.14159
- Take input the radius -
R Area = Pi * R2- Print as float Upto 4 decimal
- Must use return with a new line
\n
Code Examples
#1 Code Example with C Programming
Code -
C Programming
#include<stdio.h>
int main()
{
double R, A;
scanf("%lf", &R);
A = 3.14159 * R * R;
printf("A=%.4lf\n", A);
return 0;
}Input
Output
#2 Code Example with C++ Programming
Code -
C++ Programming
#include <iostream>
#include <iomanip>
using namespace std;
int main(){
double R,A;
cin >> R;
A = 3.14159 * R * R;
cout << "A=" << fixed << setprecision(4) << A << endl;
return 0;
}Input
Output
#3 Code Example with Java Programming
Code -
Java Programming
import java.util.Scanner;
public class Main {
public static void main(String[] args){
double R,A;
Scanner sc = new Scanner(System.in);
R = sc.nextDouble();
A = 3.14159 * R * R;
System.out.printf("A=%.4f\n", A);
}
}Input
Output
#4 Code Example with Python Programming
Code -
Python Programming
R = float(input())
Area = 3.14159 * R * R
print("A=%0.4f" %Area)Input
Output
#5 C# Example Solution URI 1002
Code -
C Programming
using System;
class URI {
static void Main(string[] args) {
double radio, area;
radio = Convert.ToDouble(Console.ReadLine());
area = 3.14159 * (radio * radio);
Console.WriteLine("A="+area.ToString("0.0000"));
Console.ReadKey();
}
}Input
Output
Demonstration
Area of a Circle
Adapted by Neilor Tonin, URI 
Brazil
The formula to calculate the area of a circumference is defined as A = π . R2. Considering to this problem that π = 3.14159:
Calculate the area using the formula given in the problem description.
Input
The input contains a value of floating point (double precision), that is the variable R.
Output
Present the message "A=" followed by the value of the variable, as in the example bellow, with four places after the decimal point. Use all double precision variables. Like all the problems, don't forget to print the end of line after the result, otherwise you will receive "Presentation Error".
| Input Samples | Output Samples |
|
2.00 |
A=12.5664 |
|
100.64 |
A=31819.3103 |
|
150.00 |
A=70685.7750 |