computer programming expected programs

1. MULTIPLICATION OF TWO MATRIX

#include<stdio.h>

#include<conio.h>

void main()

{

  int a[5][5],b[5][5],c[5][5],i,j,k,r1,c1,r2,c2;

  printf("\nEnter the row and column of first matrix");

  scanf("%d %d",&r1,&c1);

  printf("\nEnter the row and column of second matrix");

  scanf("%d %d",&r2,&c2);

  if(r1==c2)

{

      printf("\nEnter the First matrix->");

      for(i=0;i<r1;i++)

{

            for(j=0;j<c1;j++)

{

           scanf("%d",&a[i][j]);

                        }

            }

      printf("\nEnter the Second matrix->");

      for(i=0;i<r2;i++)

            {

             for(j=0;j<c2;j++)

                        {

           scanf("%d",&b[i][j]);

                        }

            }

     

      for(i=0;i<r1;i++)

            {

            for(j=0;j<c1;j++)

                        {

           c[i][j]=0;

                         for(k=0;i<r1;k++)

{       

                                    c[i][j]=c[i][j]+a[i][k]*b[k][j];

                                     }

      }

  }

}

  printf("\nThe multiplication of two matrix is\n");

  for(i=0;i<r1;i++)

{

             for(j=0;j<c1;j++)

{

           printf("%d\t",c[i][j]);

            }

  }

  getch();

}

OUTPUT

Enter the row and column of first matrix

2            2

Enter the row and column of second matrix

2           2

Enter the First matrix->1      2        3      4

Enter the second matrix->5      6        7      8

The multiplication of two matrix is 

19       22

43       50

2. PROGRAM TO SWAP TWO NUMBERS

#include<stdio.h>

#include<conio.h>

void main()

{

   int x, y, temp;

   printf("Enter the value of x and y\n");

   scanf("%d%d", &x, &y);

   printf("Before Swapping\nx = %d\ny = %d\n",x,y);

   temp = x;

   x    = y;

   y    = temp;

   printf("After Swapping\nx = %d\ny = %d\n",x,y);

   getch();

}

OUTPUT

Enter the value of x and y

10             20

Before Swapping X=10  Y=20

After Swapping X=20   Y=10

3. ‘C’ PROGRAM TO PRINT FIBONACCI SERIES

#include<stdio.h>

#include<conio.h>

void main()

{

   int n, first = 0, second = 1, next, c;

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

   scanf("%d",&n);

   printf(“\n0”);

   printf(“\n1”); 

   printf("First %d terms of Fibonacci series are :-\n",n);

   for ( c = 2 ; c < n ; c++ )

   {

     

   next = first + second;

         first = second;

         second = next;

      }

      printf("%d\n",next);

 getch();

}

OUTPUT

Enter the number of terms  5

First 5 terms of Fibonacci series are

0

1

1

2

3

4. ‘C’ PROGRAM TO FINE FACTORIAL OF A GIVEN NUMBER

SIMPLE PROGRAM

#include<stdio.h>

#include<conio.h>

void main()

{

  int c, n, fact = 1;

  printf("Enter a number to calculate it's factorial\n");

  scanf("%d", &n);

  for (c = 1; c <= n; c++)

    fact = fact * c;

  printf("Factorial of %d = %d\n", n, fact);

 getch();

}

OUTPUT

Enter a number to calculate it's factorial 6

Factorial of 6 = 720

5. USING RECURSIVE FUNCTION (FACTORIAL)

#include<stdio.h>

#include<conio.h>

void main()

     int factorial(int);

 void main()

    {

    int num;

    int result;

     printf("Enter a number to find it's Factorial: ");

    scanf("%d", &num);

    if (num < 0)

       {

        printf("Factorial of negative number not possible\n");

        }

    else

    {

        result = factorial(num);

        printf("The Factorial of %d is %d.\n", num, result);

    }

    getch();

}

int factorial(int num)

{

    if (num == 0 || num == 1)

    {

        return 1;

    }

    else

    {

        return(num * factorial(num - 1));

    }

}

OUTPUT

Enter a number to find it's Factorial -5

Factorial of negative number not possible

Enter a number to find it's Factorial 6

The Factorial of 6 IS 720

6.    C’ PROGRAM TO FIND THE ROOT OF QUADRATIC EQUATIONS.

#include <stdio.h>

#include<conio.h>

#include <math.h> /* This is needed to use sqrt() function.*/

void main()

{

  float a, b, c, determinant, r1,r2, real, imag;

  printf("Enter coefficients a, b and c: ");

  scanf("%f%f%f",&a,&b,&c);

  determinant=b*b-4*a*c;

  if (determinant>0)

  {

      r1= (-b+sqrt(determinant))/(2*a);

      r2= (-b-sqrt(determinant))/(2*a);

      printf("Roots are: %.2f and %.2f",r1 , r2);

  }

  else if (determinant==0)

  {

    r1 = r2 = -b/(2*a);

    printf("Roots are: %.2f and %.2f", r1, r2);

  }

  else

  {

    real= -b/(2*a);

    imag = sqrt(-determinant)/(2*a);

    printf("Roots are: %.2f+%.2fi and %.2f-%.2fi", real, imag, real, imag);

  }

  getch();

}

OUTPUT

Enter coefficients a, b and c: 2.3

4

5.6

Roots are: -0.87+1.30i and -0.87-1.30i

7.      ’C’ PROGRAM TO CHECK PRIME NUMBER

#include <stdio.h>

#include<conio.h>

void main()

{

   int  a,i,n, c = 0;

   printf("Enter a number to check if it is prime\n");

   scanf("%d",&n);

   for ( i = 1 ; i <= n ; i++ )

   {

a=n%i;

if(a==0)

      {

c=c+1;   

      }

   }

   if ( c == 2)

      printf("This is prime.\n");

 else

printf(“not prime”);

   getch();

}