C program to insert an element into an array:

#include <stdio.h>

int main()

{

int  a[25];

int  i, j, num, m, t, key, pos;

 

printf(“Please enter number of elements\n”);

scanf(“%d”, &num);

 

printf(“Enter the elements one by one\n”);

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

{

scanf(“%d”, &a[i]);

}

 

printf(“Input array elements:\n”);

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

{

printf(“%d\n”, a[i]);

}

 

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

{

for(j=i+1; j<num; j++)

{

if (a[i] > a[j])

{

t = a[i];

a[i] = a[j];

a[j] = t;

}

}

}

 

printf(“Sorted array elements (list):\n”);

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

{

printf(“%d\n”, a[i]);

}

printf(“Enter the element to be inserted\n”);

scanf(“%d”,&key);

 

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

{

if ( key < a[i] )

{

pos = i;

break;

}

}

 

m = num – pos + 1 ;

 

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

{

a[num-i+2] = a[num-i+1] ;

}

 

a[pos] = key;

 

printf(“Array elements (list) after inserting:\n”);

for(i=0; i<num+1; i++)

{

printf(“%d\n”, a[i]);

}

}

 Output:

Please enter number of elements

3

Enter the elements one by one

5

3

8

Input array elements:

5

3

8

Sorted array elements (list):

3

5

8

Enter the element to be inserted

2

Array elements (list) after inserting:

2

3

5

8