C Programming

Solved Example

Practice Questions

Exercise Question

Check a point is inside,outside or on the circle


Input the coordinate (x,y) for the center point of a circle and it's the radius. Input coordinate (p,q) for another point and check the point is inside the circle, outside the circle, or on the circle.



int main() {
	int x,y;
	int p,q;
	float r,d;
	printf("Enter the center point of circle: ");
	scanf("%d %d",&x,&y);
	printf("Enter the radius of circle: ");
	printf("Enter the other points cordinates: ");
	scanf("%d %d",&p,&q);
	//calculate distance between (x,y) and (p,q)
	d = sqrt((x - p) * (x - p) + (y - q) * (y - q));
	if(d > r) {
		printf("Point is outside the circle");
	}else if(d < r) {
		printf("Point is inside the circle");
	}else {
		printf("Point is on the circle");
	return 0;

Sample Output:

Enter the center point of circle: 5 5
Enter the radius of circle: 10
Enter the other points cordinates: 10 9
Point is inside the circle

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