URI Online Judge Solution 1002 - Brain Muscles URI 1002

URI Online Judge Solution 1002 - Brain Muscles URI 1002

URI Online Judge Solution 1002 ☺ Area of a Circle☺ URI Online Judge Solution 1002

Before seeing the solution make sure that you tried enough. Don’t paste the whole code, just find out the logic. If you stuck in trouble, just inform me on comment.

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URI 1002 Area of a Circle

URI Online Judge | 1002 Area of a Circle 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".
Samples Input	Samples Output
2.00	A=12.5664
100.64	A=31819.3103
150.00	A=70685.7750

URI Solution 1002 Extremely Basic in C:

#include <stdio.h>

 int main()

{

 double A,R;

  scanf("%lf",&R);

  A=3.14159*(R*R);

  printf("A=%.4lf\n",A);

  return 0;

}