text: #include <stdio.h>
  #define PI 3.14159
  
  int main(){
      int radius;
      float area;
  
      printf("Enter radius of circle: ");
      scanf("%d", &radius);
  
      area = PI * (float)radius * (float)radius;
  
      printf("\nArea of circle: %.2f", area);
  
      return 0;
  }