CODING IN C LANGUAGE ONLY Write a macro to compute the area

CODING IN C LANGUAGE ONLY

Write a macro to compute the area of a circle.

Solution

Solution.c

#include<stdio.h>//header file for input utput function

#define pie 3.14//macro
int main()
{//mainfunction
float Area, r;

printf(\"Enter the radius \ \");
scanf(\"%f\",&r);//keyboard inputting
Area=pie*r*r;
printf(\"\ Area of the Circle is = %f\ \",Area);


return 0;
}

output

                                                                                                                                                                     Area of the Circle is = 28.260000