Insert a substring to a string at specified position

Insert a substring (str) to a string (txt) at specified position (pos)

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

void main()
{
          char txt[30], str[30];
          int pos, i, k=0,m,n;
          printf("\nEnter the text: ");
          gets(txt);
          printf("\nEnter the string to be inserted: ");
          gets(str);
          printf("\nEnter the position where to be inserted: ");
          scanf("%d", &pos);
          m = strlen(txt);
          n = strlen(str);

          for(i=m-1; i>=pos; i--)
          {
                    txt[i+n] = txt[i];
          }
           i = pos;
           while(str[k] != '\0')
          {
                  txt[i] = str[k];
                   i++;
                   k++;
           }
           m = m+n;
           txt[m] = '\0';

           printf("\nThe new string is: ");
           puts(txt);
}

Output:
Enter the text: abcdefghij
Enter the string to be inserted: yyyy
Enter the position where to be inserted: 2
The new string is:  abyyyycdefghij

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/*Method 2*/

#include<stdio.h>

void main()

{

                char txt[30],  str[30], new[40];

                int pos,  j=0, i=0, k=0;

                printf("\nEnter the text: ");

                gets(txt);

                printf("\nEnter the string to be inserted: ");

                gets(str);

                printf("\nEnter the position where to be inserted: ");

                scanf("%d", &pos);

                while(txt[i] != '\0' )

                {

                                if(i == pos)

                                {

                                                while(str[k] != '\0')

                                                {

                                                                new[j] = str[k];

                                                                j++;

                                                                k++;

                                                }

                                }

                                new[j] = txt[i];

                                j++;

                                i++;

                }

                new[j] = '\0';

                printf("\nThe new string is: ");

                puts(new);

}

Output:

Enter the text:                                            how are you

Enter the string to be inserted:                  abcde

Enter the position where to be inserted:    1

The new string is:                                      habcdeow are you

Program to Insert an Element to an Array at Valid Position

Write a program to Insert an Element to an Array at Valid Position

#include<stdio.h>

#include<stdlib.h>

#define MAX 5

int a[MAX], pos, elem;

int n = 0;

void create();

void display();

void insert();

void main()

{

                int i;

                printf("\nEnter the number of elements: ");

                scanf("%d", &n);

                if(n != 0)

                                printf("\nEnter the elements: ");

                                for(i=0; i<n; i++)

                                {

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

                                }

                insert();

                display();

}

void display()

{

                int i;

                if(n == 0)

                {

                                printf("\nNo elements to display");

                                return;

                }

                printf("\nArray elements are: ");

                for(i=0; i<n; i++)

                                printf("%d\t ", a[i]);

}

void insert()

{

                int i;

                if(n == MAX)

                {

                                printf("\nArray is full. Insertion is not possible");

                                return;

                }

                do

                {

                                printf("\nEnter a valid position where element to be inserted:    ");

                                scanf("%d", &pos);

                }while(pos>n);

                printf("\nEnter the value to be inserted:   ");

                scanf("%d", &elem);

                for(i =n-1; i>=pos ; i--)

                {

                                a[i+1] = a[i];

                }

                a[pos] = elem;

                n = n+1;

    }

Output:

Case 1:

Enter the number of elements: 3

Enter the elements: 11                  22           33

Enter a valid position where element to be inserted:    5

Enter a valid position where element to be inserted:    1

Enter the value to be inserted:   44

Array elements are: 11   44      22      33

Case 2:

Enter the number of elements: 5

Enter the elements: 11                  22           33           44           55

Array is full. Insertion is not possible

Array elements are: 11   22      33      44      55

Also Check,

• Program to Delete an Element from an Array at Valid Position