Search a String To Another String in C

A simple program that I wrote to search a string or a word to another string using C language. The code is very simple and easy to understand.

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My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com. 

My mobile number here in the Philippines is 09173084360.

Program Listing

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int xstrsearch ( char *, char * ) ;

void show( ) ;

int main( )

{

char s1[ ] = "PomperadaJake" ;

char s2[ ] = "Jake" ;

int pos ;

system("cls");

printf("Search a String To Another String in C")

         printf("\n\n");

printf ( "String One: %s\n", s1 ) ;

printf ( "String Two: %s\n", s2 ) ;

pos = xstrsearch ( s1, s2 ) ;

printf ( "\nThe pattern string is found at position: %d\n", pos ) ;

getch( ) ;

}

int xstrsearch ( char * s1, char * s2 )

{

int i, j, k ;

int l1 = strlen ( s1 ) ;

int l2 = strlen ( s2 ) ;

for ( i = 0 ; i <= l1 - l2 ; i++ )

{

j = 0 ;

k = i ;

while ( ( s1[k] == s2[j] ) && ( j < l2 ) )

{

k++ ;

j++ ;

}

if ( j == l2 )

return i ;

}

return -1 ;

}