4. WAP to calculate the area of circle and user will enter the radius.

Posted: August 26, 2012 in Lab 9, MECH Sem1
#include <stdio.h>
int main(){
  float r, a;
  printf("Radius: ");
  scanf("%f", &r);
  a = 3.14 * r * r;
  printf("%f\n", a);
  return 0;
}

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