Calculate area of a rectangle, triangle and circle

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Specifer

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Comment

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Iterative statement

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Header file

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Working with switch case

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Calculate area of a rectangle, triangle and circle

Solving any mathematical problem there are used some equation. So, to solve our problem we used three equations:

For CIRCLE: Π * radius²

For triangle: 0.5 * height * base

For rectangle: height * width


// AHF C PROGRAM SOLVING

//solving here basic type of programming problem

#include<stdio.h>
#include<math.h>
#define pf printf

int main()
{
    double radius,a,b,height,width,res1=0.0,res2=0.0,res3=0.0;

    //area for circle
    pf("\nEnter value for circle..............");

    pf("\nEnter the radius of the circle: ");
    scanf("%lf",&radius);

    res1=3.1416*radius*radius;


    //area for triangle
    pf("\nEnter value for triangle..............");

    pf("\nEnter the first length: ");
    scanf("%lf",&a);

    pf("\nEnter the second length: ");
    scanf("%lf",&b);

    res2=.5*a*b;


    //area for rectangle
    pf("\nEnter value for rectangle..............");

    pf("\nEnter the height: ");
    scanf("%lf",&height);

    pf("\nEnter the width: ");
    scanf("%lf",&width);

    res3=height*width;



    //total output
    pf("\nThe area of the circle is : %lf",res1);

    pf("\nThe area of the triangle is = %lf",res2);

    pf("\nThe area of the rectangle is = %lf",res3);

    return 0;
}

OUTPUT:

Enter value for circle..............

Enter the radius of the circle: 2.5

Enter value for triangle..............

Enter the first length: 2

Enter the second length: 3

Enter value for rectangle..............

Enter the height: 8

Enter the width: 6

The area of the circle is : 19.635000

The area of the triangle is = 3.000000

The area of the rectangle is = 48.000000