Deleting An Element in Array Using C

#include <stdio.h>
 
int main()
{
   int array[100], position, c, n;
 
   printf("Enter number of elements in array\n");
   scanf("%d", &n);
 
   printf("Enter %d elements\n", n);
 
   for ( c = 0 ; c < n ; c++ )
      scanf("%d", &array[c]);
 
   printf("Enter the location where you wish to delete element\n");
   scanf("%d", &position);
 
   if ( position >= n+1 )
      printf("Deletion not possible.\n");
   else
   {
      for ( c = position - 1 ; c < n - 1 ; c++ )
         array[c] = array[c+1];
 
      printf("Resultant array is\n");
 
      for( c = 0 ; c < n - 1 ; c++ )
         printf("%d\n", array[c]);
   }
 
   return 0;
}

Reverse an Array in C

C program to reverse an array: This program reverses the array elements. For example if a is an array of integers with three elements such that
a[0] = 1
a[1] = 2
a[2] = 3
Then on reversing the array will be
a[0] = 3
a[1] = 2
a[0] = 1

#include <stdio.h>
 
int main()
{
   int n, c, d, a[100], b[100];
 
   printf("Enter the number of elements in array\n");
   scanf("%d", &n);
 
   printf("Enter the array elements\n");
 
   for (c = 0; c < n ; c++)
      scanf("%d", &a[c]);

   for (c = n - 1, d = 0; c >= 0; c--, d++)
      b[d] = a[c];
 
 
   for (c = 0; c < n; c++)
      a[c] = b[c];
 
   printf("Reverse array is\n");
 
   for (c = 0; c < n; c++)
      printf("%d\n", a[c]);
 
   return 0;
}

Linear Search in C programming

#include <stdio.h>
 
int main()
{
   int array[100], search, c, n;
 
   printf("Enter the number of elements in array\n");
   scanf("%d",&n);
 
   printf("Enter %d integer(s)\n", n);
 
   for (c = 0; c < n; c++)
      scanf("%d", &array[c]);
 
   printf("Enter the number to search\n");
   scanf("%d", &search);
 
   for (c = 0; c < n; c++)
   {
      if (array[c] == search)     /* if required element found */
      {
         printf("%d is present at location %d.\n", search, c+1);
         break;
      }
   }
   if (c == n)
      printf("%d is not present in array.\n", search);
 
   return 0;
}

Minimum Element in an Array

#include <stdio.h>
 
int main() 
{
    int array[100], minimum, size, c, location = 1;
 
    printf("Enter the number of elements in array\n");
    scanf("%d",&size);
 
    printf("Enter %d integers\n", size);
 
    for ( c = 0 ; c < size ; c++ )
        scanf("%d", &array[c]);
 
    minimum = array[0];
 
    for ( c = 1 ; c < size ; c++ ) 
    {
        if ( array[c] < minimum ) 
        {
           minimum = array[c];
           location = c+1;
        }
    } 
 
    printf("Minimum element is present at location %d and it's value is %d.\n", location, minimum);
    return 0;
}

To Find Maximum Element in An Array

#include <stdio.h>
 
int main()
{
  int array[100], maximum, size, c, location = 1;
 
  printf("Enter the number of elements in array\n");
  scanf("%d", &size);
 
  printf("Enter %d integers\n", size);
 
  for (c = 0; c < size; c++)
    scanf("%d", &array[c]);
 
  maximum = array[0];
 
  for (c = 1; c < size; c++)
  {
    if (array[c] > maximum)
    {
       maximum  = array[c];
       location = c+1;
    }
  }
 
  printf("Maximum element is present at location %d and it's value is %d.\n", location, maximum);
  return 0;
}

Check if the Substring is present in the given String

#include<stdio.h>

void main()
{
    char str[80], search[10];
    int count1 = 0, count2 = 0, i, j, flag;

    printf("Enter a string:");
    gets(str);
    printf("Enter search substring:");
    gets(search);
    while (str[count1] != '�')
        count1++;
    while (search[count2] != '�')
        count2++;
    for (i = 0; i <= count1 - count2; i++)
    {
        for (j = i; j < i + count2; j++)
        {
            flag = 1;
            if (str[j] != search[j - i])
            {
                flag = 0;
                break;
            }
        }
        if (flag == 1)
            break;
    }
    if (flag == 1)
        printf("SEARCH SUCCESSFUL!");
    else
        printf("SEARCH UNSUCCESSFUL!");
}

Find the Sum of each Row & each Column of a MxN Matrix

#include <stdio.h>

void main ()
{
    static int array[10][10];
    int i, j, m, n, sum = 0;

    printf("Enter the order of the matrix\n");
    scanf("%d %d", &m, &n);
    printf("Enter the co-efficients of the matrix\n");
    for (i = 0; i < m; ++i)
    {
        for (j = 0; j < n; ++j)
        {
            scanf("%d", &array[i][j]);
        }
    }
    for (i = 0; i < m; ++i)
    {
        for (j = 0; j < n; ++j)
        {
            sum = sum + array[i][j] ;
        }
        printf("Sum of the %d row is = %d\n", i, sum);
        sum = 0;
    }
    sum = 0;
    for (j = 0; j < n; ++j)
    {
        for (i = 0; i < m; ++i)
        {
            sum = sum + array[i][j];
        }
        printf("Sum of the %d column is = %d\n", j, sum);
        sum = 0;
    }
}

Inserting An Element in Array using C

#include <stdio.h>
 
int main()
{
   int array[100], position, c, n, value;
 
   printf("Enter number of elements in array\n");
   scanf("%d", &n);
 
   printf("Enter %d elements\n", n);
 
   for (c = 0; c < n; c++)
      scanf("%d", &array[c]);
 
   printf("Enter the location where you wish to insert an element\n");
   scanf("%d", &position);
 
   printf("Enter the value to insert\n");
   scanf("%d", &value);
 
   for (c = n - 1; c >= position - 1; c--)
      array[c+1] = array[c];
 
   array[position-1] = value;
 
   printf("Resultant array is\n");
 
   for (c = 0; c <= n; c++)
      printf("%d\n", array[c]);
 
   return 0;
}

Find the Frequency of Odd & Even Numbers in the given Matrix

#include <stdio.h>

void main()
{
static int array[10][10];
int i, j, m, n, even = 0, odd = 0;

printf("Enter the order ofthe matrix \n");
scanf("%d %d", &m, &n);
printf("Enter the coefficients of matrix \n");
for (i = 0; i < m; ++i)
{
            for (j = 0; j < n; ++j)
            {
                 scanf("%d", &array[i][j]);
                 if ((array[i][j] % 2) == 0)
                 {
                     ++even;
                 }
                 else
                     ++odd;
             }
}
printf("The given matrix is \n");
for (i = 0; i < m; ++i)
{
        for (j = 0; j < n; ++j)
        {
            printf(" %d", array[i][j]);
        }
        printf("\n");
    }
    printf("\n The frequency of occurance of odd number  = %d \n", odd);
    printf("The frequency of occurance of even number = %d\n", even);
}

Calculate the Sum of the Elements of each Row & Column In Matrix

#include <stdio.h>
int Addrow(int array1[10][10], int k, int c);
int Addcol(int array1[10][10], int k, int r);

void main()
{
    int arr[10][10];
    int i, j, row, col, rowsum, colsum, sumall=0;

    printf("Enter the order of the matrix \n");
    scanf("%d %d", &row, &col);
    printf("Enter the elements of the matrix \n");
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < col; j++)
        {
            scanf("%d", &arr[i][j]);
        }
    }
    printf("Input matrix is \n");
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < col; j++)
        {
            printf("%3d", arr[i][j]);
        }
        printf("\n");
    }
    /*  computing row sum */
    for (i = 0; i < row; i++)
    {
        rowsum = Addrow(arr, i, col);
        printf("Sum of row %d = %d\n", i + 1, rowsum);
    }
    /*  computing col sum */
    for (j = 0; j < col; j++)
    {
        colsum = Addcol(arr, j, row);
        printf("Sum of column  %d = %d\n", j + 1, colsum);
    }
    /*  computation of all elements */
    for (j = 0; j < row; j++)
    {
        sumall = sumall + Addrow(arr, j, col);
    }
    printf("Sum of all elements of matrix = %d\n", sumall);
}
/*  Function to add each row */
int Addrow(int array1[10][10], int k, int c)
{
    int rsum = 0, i;
    for (i = 0; i < c; i++)
    {
        rsum = rsum + array1[k][i];
    }
    return(rsum);
}
/*  Function to add each column */
int Addcol(int array1[10][10], int k, int r)
{
    int csum = 0, j;
    for (j = 0; j < r; j++)
    {
        csum = csum + array1[j][k];
    }
    return(csum);
}

Interchange any two Rows & Columns in the given Matrix

#include <stdio.h>

 

void main()

{

    static int array1[10][10], array2[10][10];

    int i, j, m, n, a, b, c, p, q, r;

 

    printf("Enter the order of the matrix \n");

    scanf("%d %d", &m, &n);

    printf("Enter the co-efficents of the matrix \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

        {

            scanf("%d,", &array1[i][j]);

            array2[i][j] = array1[i][j];

        }

    }

    printf("Enter the numbers of two rows to be exchanged \n");

    scanf("%d %d", &a, &b);

    for (i = 0; i < m; ++i)

    {

        /*  first row has index is 0 */

        c = array1[a - 1][i];

        array1[a - 1][i] = array1[b - 1][i];

        array1[b - 1][i] = c;

    }

    printf("Enter the numbers of two columns to be exchanged \n");

    scanf("%d %d", &p, &q);

    printf("The given matrix is \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

            printf(" %d", array2[i][j]);

        printf("\n");

    }

    for (i = 0; i < n; ++i)

    {

        /*  first column index is 0 */

        r = array2[i][p - 1];

        array2[i][p - 1] = array2[i][q - 1];

        array2[i][q - 1] = r;

     }

    printf("The matix after interchanging the two rows(in the original matrix) \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

        {

            printf(" %d", array1[i][j]);

        }

        printf("\n");

     }

    printf("The matix after interchanging the two columns(in the original matrix) \n");

    for (i = 0; i < m; ++i)

    {

        for (j = 0; j < n; ++j)

            printf(" %d", array2[i][j]);

        printf("\n");

    }

}

Check if a given Matrix is an Identity Matrix

#include <stdio.h>

void main()
{
    int a[10][10];
    int i, j, row, column, flag = 1;

    printf("Enter the order of the matrix A \n");
    scanf("%d %d", &row, &column);
    printf("Enter the elements of matrix A \n");
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < column; j++)
        {
            scanf("%d", &a[i][j]);
        }
    }
    printf("MATRIX A is \n");
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < column; j++)
        {
            printf("%3d", a[i][j]);
        }
        printf("\n");
    }
    /*  Check for unit (or identity) matrix */
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < column; j++)
        {
            if (a[i][j] != 1 && a[j][i] != 0)
            {
                flag = 0;
                break;
            }
        }
    }
    if (flag == 1 )
        printf("It is identity matrix \n");
    else
        printf("It is not a identity matrix \n");
}

Check whether a given Character is present in a String, Find Frequency & Position of Occurrence

#include <stdio.h>
#include <string.h>

int main()
{
    char a, word[50];
    int i, freq = 0, flag = 0;

    printf("Enter character: ");
    scanf("%c", &a);
    printf("Now enter the word: ");
    scanf("%s", word);
    printf("Positions of '%c' in %s are: ", a, word);
    for (i = 0; i < strlen(word); i++)
    {
        if (word[i] == a)
        {
            flag = 1;
            printf("%d  ", i + 1);
            freq++;
        }
    }
    if (flag)
    {
        printf("\nCharacter '%c' occured for %d times.\n", a, freq);
    }
    else
    {
        printf("None\n");
    }

    return 0;
}

Printing Random Numbers

#include <stdio.h>#include <stdlib.h> int main() {  int c, n;   printf("Ten random numbers in [1,100]\n");   for (c = 1; c <= 10; c++) {    n = rand() % 100 + 1;    printf("%d\n", n);  }   return 0;}

Counting Frequency of character

#include <stdio.h>
#include <string.h>

int main()
{
   char string[100];
   int c = 0, count[26] = {0};

   printf("Enter a string\n");
   gets(string);

   while (string[c] != '\0')
   {
     

      if (string[c] >= 'a' && string[c] <= 'z') 
         count[string[c]-'a']++;

      c++;
   }

   for (c = 0; c < 26; c++)
   {
      

      if (count[c] != 0)
         printf("%c occurs %d times in the entered string.\n",c+'a',count[c]);
   }

   return 0;
}

C Programs For Anagrams

#include <stdio.h>

int check_anagram(char [], char []);

int main()
{
   char a[100], b[100];
   int flag;

   printf("Enter first string\n");
   gets(a);

   printf("Enter second string\n");
   gets(b);

   flag = check_anagram(a, b);

   if (flag == 1)
      printf("\"%s\" and \"%s\" are anagrams.\n", a, b);
   else
      printf("\"%s\" and \"%s\" are not anagrams.\n", a, b);

   return 0;
}

int check_anagram(char a[], char b[])
{
   int first[26] = {0}, second[26] = {0}, c = 0;

   while (a[c] != '\0')
   {
      first[a[c]-'a']++;
      c++;
   }

   c = 0;

   while (b[c] != '\0')
   {
      second[b[c]-'a']++;
      c++;
   }

   for (c = 0; c < 26; c++)
   {
      if (first[c] != second[c])
         return 0;
   }

   return 1;
}