SP Practical 9

Practical : 9

Subject : System Programming

Aim : Use macro features for C language

Source Code :

#include <stdio.h>

#define PI 3.1415

#define circleArea(r) (PI*r*r)

int main()

{

    int radius;

    float area;

    printf("Enter the radius: ");

    scanf("%d", &radius);

    area = circleArea(radius);

    printf("Area = %.2f", area);

 printf("Current time: %s",__TIME__);   //calculate the current time

    return 0;

}

Output :