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  1. // Online C compiler to run C program online
  2. #include <stdio.h>
  3.  
  4. int main() {
  5.     float radius;
  6.     scanf("%f",&radius);
  7.     float pi = 3.1415;
  8.     float area = pi * radius * radius ;
  9.     printf("the area of circle is : %f",area);
  10.     return 0;
  11. }
  12.  
  13.  
Success #stdin #stdout 0.01s 5288KB
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stdin 
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stdout 
the area of circle is : 314.150024
https://ideone.com/j6itRu
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

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