CS256 - Principles of Structured Design Fall 2021

Displaying ./code/h2sol/circle.c

/*

circle.c - get a radius from the user, find the area and circumference.

    The formulas you need are as follows

	circumference = 2 * pi * radius
	area = pi * radius * radius

	ote that pi has already been defined for you below
*/

#include <stdio.h>

int main(){

	//variable declarations
	float radius, circumference, area;
	float pi = 3.14159;


	printf("Enter the radius:> ");//use printf to ask the user for a radius
	scanf("%f", &radius); //use scanf to get a decimal number "%f" from the user

	circumference = 2 * pi * radius; //then calculate the circumference
	area = pi * radius * radius;  //then calculate the area

	printf("This circle's circumference is %f\n", circumference);//print the circumference
	printf("This circle's area is %f\n", area);//print the area

	return 0;
}