Calculate area of a circle - C Program
C program to calculate area of circle.
Solution:
In this program, accept radius of circle from user and calculate area of circle using following formula:
Area of Circle = pi * r * r
Here, pi = 3.14
#include<stdio.h>
int main()
{
/* variable declaration part */
int r;
float area;
/* Reading part */
printf("Enter Radius : ");
scanf("%d",&r);
/* Processing part */
area=3.14*r*r;
/* Output part */
printf("\nArea of Circle = %f",area);
return 0;
}
Output:
In the above output, we can fix the digit after decimal points while printing the area of circle. If we want to fix 2 digit after decimal point then use .2 (point two) in following statement.
printf("Area of Circle = .2f",area);
Following is the output after writing above statement in program.
Similarly, you can fix digit in any program where you need.