C Program To Find Area Of SemiCircle

C program to find Area Of SemiCircle; Through this tutorial, we will learn how to find or calculate area Of semiCircle using standard formula, function and pointer in c programs.

Programs and Algorithm to Find Area Of SemiCircle

Use the following algorithm and programs to find or calculate area Of semiCircle using standard formula, function, and pointer in c:

• Algorithm to Find Area Of SemiCircle
• C Program to Find Area Of SemiCircle using Standard Formula
• C Program to Find Area Of SemiCircle using Function
• C Program to Find Area Of SemiCircle using Pointer

Algorithm to Find Area Of SemiCircle

Use the following algorithm to write a program to find the area Of semiCircle; as follows:

1. Take input radious. Store it in variable.
2. Calculate area of semicircle using area=(22*r*r)/(2*7);
3. Finally, print the value of area of semicircle.

C Program to Find Area Of SemiCircle using Standard Formula

#include<stdio.h>
int main()
{
	int r;
	float area;
	printf("enter radius of the circle: ");
	scanf("%d",&r);
	area=(22*r*r)/(2*7);
	printf("area of a semicircle: %f\n",area);
	return 0;
}

The output of the above c program; as follows:

enter radius of the circle: 5
area of a semicircle: 39.000000

C Program to Find Area Of SemiCircle using Function

#include<stdio.h>
float area(float r)
{
	return (22*r*r)/(7*2);
}
int main()
{
	float a,r;
	printf("enter radius of the semicircle: ");
	scanf("%f",&r);
        a=area(r);
	printf("area of a semicircle: %f\n",a);
	return 0;
}

The output of the above c program; as follows:

enter radius of the semicircle: 8
area of a semicircle: 100.57142

C Program to Find Area Of SemiCircle using Pointer

#include<stdio.h>
void area(float *r,float *a)
{
	*a=(22*(*r)*(*r))/(2*7);
}

int main()
{
	float r,a=1;
	printf("enter radius: ");
	scanf("%f",&r);
        area(&r,&a);
	printf("area of a semicircle: %f\n",a);
	return 0;
}

The output of the above c program; as follows:

enter radius: 10
area of a semicircle: 157.14285

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