C using Geometrical Figures and Surface Area of cylinder and cos pro

Find the Areas of Different Geometrical Figures

#include 

#include 

void main()

{

    int fig_code;

    float side, base, length, breadth, height, area, radius;

    clrscr();

    printf("-------------------------\n");

    printf(" 1 --> Circle\n");

    printf(" 2 --> Rectangle\n");

    printf(" 3 --> Triangle\n");

    printf(" 4 --> Square\n");

    printf("-------------------------\n");

    printf("Enter the Figure code\n");

    scanf("%d", &fig_code);

    switch(fig_code)

    {

    case 1:

        printf("Enter the radius\n");

        scanf("%f", &radius);

        area = 3.142 * radius * radius;

        printf("Area of a circle = %f\n", area);

        break;

    case 2:

        printf("Enter the breadth and length\n");

        scanf("%f %f", &breadth, &length);

        area = breadth * length;

        printf("Area of a Reactangle = %f\n", area);

        break;

    case 3:

        printf("Enter the base and height\n");

        scanf("%f %f", &base, &height);

        area = 0.5 * base * height;

        printf("Area of a Triangle = %f\n", area);

        break;

    case 4:

        printf("Enter the side\n");

        scanf("%f", &side);

        area = side * side;

        printf("Area of a Square=%f\n", area);

        break;

    default:

        printf("Error in figure code\n");

        break;

    }

    getch();

}

Output

-------------------------

 1 --> Circle

 2 --> Rectangle

 3 --> Triangle

 4 --> Square

-------------------------

Enter the Figure code

1

Enter the radius

30

Area of a circle = 2827.800049

Calculate the Sum of cos(x) Series

#include 

#include 

#include 

void main()

{

    int n, x1, i, j;

    float x, sign, cosx, fact;

    clrscr();

    printf("Enter the number of the terms in a series\n");

    scanf("%d", &n);

    printf("Enter the value of x(in degrees)\n");

    scanf("%f", &x);

    x1 = x;

    x = x * (3.142 / 180.0);

    cosx = 1;

    sign = -1;

    for (i = 2; i <= n; i = i + 2)

    {

        fact = 1;

        for (j = 1; j <= i; j++)

        {

            fact = fact * j;

        }

        cosx = cosx + (pow(x, i) / fact) * sign;

        sign = sign * (-1);

    }

    printf("Sum of the cosine series = %7.2f\n", cosx);

    printf("The value of cos(%d) using library function = %f\n", x1, cos(x));

    getch();

    getch();

}

Output

Enter the number of the terms in a series

3

Enter the value of x(in degrees)

90

Sum of the cosine series =   -0.23

The value of cos(90) using library function = -0.000204

Find the Volume and Surface Area of cylinder

#include 

#include 

#include 

int main()

{

    float radius, height;

    float surface_area, volume;

    clrscr();

    printf("Enter  value for  radius and height of a cylinder : \n");

    scanf("%f%f", &radius, &height);

    surface_area = 2 * (22 / 7) * radius * (radius + height);

    volume = (22 / 7) * radius * radius * height;

    printf("Surface area of cylinder is: %.3f", surface_area);

    printf("\n Volume of cylinder is : %.3f", volume);

    return 0;

    getch();

}

Output

Enter  value for  radius and height of a cylinder :

15 17

Surface area of cylinder is: 2880.000

Volume of cylinder is : 11475.000