Program to calculate the unknowns of simultaneous linear equations

#include<stdio.h>
#include<math.h>
int main()
{
int i,j,k,n;
float c,a[100][101],x[100];
printf("Enter the no. of variables:");

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C++ program to add two Complex no. using this pointer

#include<iostream>
using namespace std;
class Complex
{
private:
float real,imag;
public:
Complex():real(0),imag(0){}

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C++ program that illustrates the order of constructor and destructor invocation in nice way

#include<iostream>
using namespace std;
class Dept{
    private:
        int id;
        char name[30];
    public:
        Dept(){}

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program to store the information about students in file and retrieve information arranging in alphabetical order

#include<stdio.h>
#include<string.h>
int main()
{
    struct student
    {
        char name[20],address[20],phone[15];
        int roll;
    }s[20];
    int i,j,n;
    FILE *fp;

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Program to arrange the given names in ascending order

#include<stdio.h>
#include<string.h>
int main()
{
    int i,j,n;
    char name[15][20],temp[20];
    printf("Enter number of students:");
    scanf("%d",&n);

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program to find palindrome of a string

/*program to find palindrome of a string*/

#include<stdio.h>

#include<string.h>

int main()

{

    int i,j,len,flag=1;

    char string[100];

    printf("Enter a string:");

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Program to calculate the length of string without using string handling function

/*Program to calculate the length of string*/

/*without using string handling functions*/

#include<stdio.h>

int main()

{

    char string[100];

    int i,count=0;

    printf("Enter the string:");

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Program to display the prime numbers in the given range and show its count

#include<stdio.h>

int main()

{

    int i,j,a,b,m=0;

    printf("Enter the range:");

    scanf("%d%d",&a,&b);

    printf("The prime numbers in this range are:\n");

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Program to check whether the entered number is prime or not

#include<stdio.h>

int main( )

{

    int num, i ;

    printf ( "Enter a number:" ) ;

    scanf ( "%d", &num ) ;

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Program to find the factorial of a number using recursive function

#include<stdio.h>

int factorial(int);

int main()

{

    int n;

    printf("Enter the number:");

    scanf("%d",&n);

    printf("The factorial is %d",factorial(n));

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Program to find the transpose of the matrix of nth order

#include<stdio.h>

int main()

{

    int i,j,a[10][10],m,n;

    printf("Enter the no.of rows and columns:");

    scanf("%d%d",&m,&n);

    printf("\nEnter the elements of Matrix:\n");

    for(i=0;i< m;i++)

    for(j=0;j< n;j++)

    {

        printf("Enter element a[%d][%d]:",i+1,j+1);

        scanf("%d",&a[i][j]);

    }

    printf("\nThe original matrix is:\n");

    for(i=0;i< m;i++)

    {

    for(j=0;j< n;j++)

    {

     printf("%d\t",a[i][j]);

    }

    printf("\n");

    }

    printf("\nThe transposed matrix is:\n");

    for(i=0;i< n;i++)

    {

        for(j=0;j< m;j++)

        {

            printf("%d\t",a[j][i]);

        }

        printf("\n");

    }

    return 0;

}

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Program to concatenate two strings

#include<stdio.h>

#include<string.h>

int main()

{

    char a[20],b[20];

    printf("Enter the  first string:");

    gets(a);

    printf("Enter the second string:");

    gets(b);

    strcat(a,b);

    printf("The concatenated string is %s.",a);

    return 0;

}

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Program to calculate the total number of words in the given text

#include<stdio.h>

#include<string.h>

int main()

{

    char a[20];

    int i,n,count=0;

    printf("Enter the text:");

    gets(a);

    n=strlen(a);

    for(i=0;i<=n;i++)

    {

        if(a[i]==' '||a[i]=='\0')

        count++;

    }

    printf("\nTotal number of words in the string is %d.",count);

    return 0;

}

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Program to find the greatest number using pointers

#include<stdio.h>

void main()

{

    int a[20],i,*p,x,*y,n;

    printf("How many numbers?");

    scanf("%d",&n);

    p=a;

    y=&x;

    printf("Enter %d numbers:",n);

    for(i=0;i<n;i++)

    {

        scanf("%d",(p+i));

    }

    *y=*p;

    for(i=0;i<n;i++)

    {

        if(*y<*(p+i))

        *y=*(p+i);

    }

    printf("\n The greatest number is %d.",x);

}

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Program to sort the numbers entered by user in ascending and descending order using function

#include<stdio.h>

void ascending (int[],int);

void descending (int[],int);

int main()

{

    int a[20],i,n;

    printf("How many numbers?");

    scanf("%d",&n);

    printf("Enter %d numbers:",n);

    for(i=0;i<n;i++)

    {

        scanf("%d",&a[i]);

    }

    ascending(a,n);

    descending(a,n);

    return 0;

}

void ascending(int a[],int n)

{

    int i,j,temp;

    printf("\nNumbers sorted in ascending order:\n");

    for(i=0;i<n;i++)

     {

         for(j=i+1;j<n;j++)

         {

             if(a[i]>a[j])

             {

                 temp=a[i];

                 a[i]=a[j];

                 a[j]=temp;

             }

         }

     }

     for(i=0;i<n;i++)

     {

         printf("%d\t",a[i]);

     }

}

void descending(int a[],int n)

{

    int i, j,temp;

    printf("\nNumbers sorted in descending order:\n");

    for(i=0;i<n;i++)

    {

        for(j=i+1;j<n;j++)

        {

            if(a[i]<a[j])

            {

                temp=a[i];

                a[i]=a[j];

                a[j]=temp;

            }

        }

    }

  for(i=0;i<n;i++)

  {

      printf("%d\t",a[i]);

  }

}

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