comparing two string

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

void main()

{

clrscr();

char *ptr;

char *ptr1;

int i=0,j=0,k=1;

char str1[20],str2[20];

cout<<"Enter a string:";

gets(str1);

cout<<"Enter another string:";

gets(str2);

ptr1=str2;

cout<<endl<<"Original string is:";

puts(str1);

ptr=str1;

for(i=0,j=0;*(ptr+i)!='\0';i++,j++)

{

      if( *(ptr1+j)==*(ptr+i) )

      k=1;

}

if(k==1)

cout<<endl<<"Similar string";

else

cout<<endl<<"Different string";

getch();

}