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';
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
---------------------------------------------------------------------------------------------------
/*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
