Smart Code For YOU

Write a C++ program to find a sub-string within a string. If found display its starting position.

Program Code:

#include<iostream>

using namespace std;

int main( )

{

 int i, j, length = 0; // Variable to hold length of second string  

char name1[30], name2[30];

cout<<"Enter your first string: ";

cin.getline(name1, 30);

cout<<endl;

cout<<"Enter second string: ";

cin.getline(name2, 30);

cout<<endl; 

for(i = 0; name2[i] != '\0'; i++) //finding length of second string

{

length = length + 1;

}        

for(i = 0, j = 0; name1[i] != '\0' && name2[j] != '\0'; i++)

{

if(name1[i] == name2[j])

{

 j++;

}

else

{

j = 0;

}

}

if(j == length)

{

cout<<"Sub-string ( Second String)  is found at position "<< i - j + 1;

}

else

{

cout<<"Sub-string ( Second String) is not found";

}

return 0;

}

The program output is tested on www.jdoodle.com

Output: 

Enter your first string: mukesh 

Enter second string: esh

Sub-string ( Second String) found at position 4

Thanks

Mukesh Rajput