Concat 2 strings into One(without strcat() func)

#include<iostream.h>

#include<conio.h>

void main()
{
char s1[20], s2[20], target[40];
cout<<"\n Enter 1st String:";
cin.getline(s1,20);
cout<<"\n Enter 2nd String:";
cin.getline(s2,20);


iny k = 0;


/* First string into the target */
for(int i = 0; s1[i]!='\0';i++,k++)
target[k] = s1[i];


/* Append second string into target */
for(i = 0; s2[i]!='\0';i++,k++)
target[k] = s2[i];




clrscr();
cout<<"\n The Firstly Entered String = "<<  s 1;
cout<<"\n Next  Entered String = "<< s 2;
cout<<"\n\n The Output String = "<< target;


getch();
}