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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <math.h>
  4. #include <stdlib.h>
  5.  
  6. int main() {
  7.  
  8.     float a;
  9.  
  10.     scanf("%f",&a);
  11.     if(a>0){
  12.    printf("The area of the circle is %.2f",3.14*a*a);}
  13.  
  14.     else{
  15.         printf("Invalid input");
  16.     }
  17.  
  18.     return 0;
  19. }
Success #stdin #stdout 0s 5548KB
comments (?)
stdin
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Standard input is empty
stdout
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The area of the circle is 0.00
https://ideone.com/PS7K6t
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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