Functions to insert a sub string into given main string from a given position

Description:

in this program we need to insert a string into another string from a specified position.

Algorithm:

Step 1: start

Step 2: read main string and sub string

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

Step 4: find length of sub string(n)

Step 5: copy main string into sub string

Step 6: read the position to insert the sub string( p)

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

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

Step 9: print the strings

Step 10: stop

Program:

#include <stdio.h>

#include <conio.h>

#include <string.h>

void main()

{

char a[10];

char b[10];

char c[10];

int p=0,r=0,i=0;

int t=0;

int x,g,s,n,o;

clrscr();

           

puts("Enter First String:");

gets(a);

puts("Enter Second String:");

gets(b);

printf("Enter the position where the item has to be inserted: ");

scanf("%d",&p);

r = strlen(a);

n = strlen(b);

i=0;

// Copying the input string into another array

while(i <= r)

{

 c[i]=a[i];

 i++;

}

s = n+r;

o = p+n;

// Adding the sub-string

for(i=p;i<s;i++)

{

 x = c[i];

 if(t<n)

 {

                                    a[i] = b[t];

  t=t+1;

                        }

 a[o]=x;

 o=o+1;

}

printf("%s", a);

getch();

}

Output:

1.enter first string:

   computer

2.enter second string:

    gec

3.enter the position where the item has to be inserted:3

   comgecputer

conclusion : the program is error free

VIVA QUESATIONS:

1)      What is string ?

Ans: A string is an collection of characters

2)      Which command is used to combined the two strings ?

Ans: Strcat()

3)      Which command is used to copy the strings ?

Ans: By using the strcpy() function copies one string to another