Write a C program to use function to insert a sub-string in to given main string from a given position

In this article, we will write a C program to use a function to insert a sub-string in to given main string from a given position.

Algorithm: 

Step 1: start 

Step 2: read a main string and substring 

Step 3: find the length of the main string(r) 

Step 4: find the length of substring(n) 

Step 5: copy the main string into substring 

Step 6: read the position to insert the substring( p) 

Step 7: copy substring into the main string from position p-1 

Step 8: copy the temporary string into the main string from position p+n-1 

Step 9: print the strings 

Step 10: stop 

Write a C program to use a function to insert a sub-string in to given main string from a given position

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

main()
{
	char a[3 qq0], b[30], c[30];
	int pos = 0, i = 0, l, la, lb, lc, j;
	puts("Enter a string");
	gets(a);
	puts("Enter sub string");
	gets(b);
	puts("enter position for insertion");
	scanf("%d", &pos);
	la = strlen(a);
	lb = strlen(b);
	l = pos + lb;
	lc = la + lb;
	for (i = 0; i < pos; i++)
	{
		c[i] = a[i];
	}
	j = 0;
	for (i = pos; i <= l; i++)
	{
		c[i] = b[j];
		j++;
	}
	j = pos;
	for (i = l; i < lc; i++)
	{
		c[i] = a[j];
		j++;
	}
	c[i] = '\0';
	puts("String after Insertion is:");
	printf("%s", c);
}

Input:

Enter First String:
 Comer
Enter Second String:
 put

Output:

Enter the position where the item has to be inserted:3
 Computer 

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