C Program to find area of Sector

Program

#include<stdio.h>
#define PI 3.141
void main()
{
    int angle, radius;
    float area;
    printf("Enter the angle between the radii:\t");
    scanf("%d", &angle);
    printf("Enter the radius:\t");
    scanf("%d", &radius);
    area = (PI * (radius * radius) * angle) / 360;
    printf("The area of the sector is:\t%f\n", area);
}

Output

Enter the angle between the radii:      42
Enter the radius:       5
The area of the sector is:      9.161250