#include <iostream>
//#include<stdio.h>
// cstdio library and stdio.h header file
#include<string.h>
using namespace std;
//compare_string_C_Cplus1.cpp
int main()
{
	char chstr1[12] = "Hello World";
	unsigned int n1;  
	char ch1[13]; // defined the length of an array
	n1= strlen(chstr1);
	cout<<"\n string length " <<n1 << endl;
	n1 = n1+1; 
	for(int i = 0; i <n1 ; i++)
	{
	strcpy(ch1, "");
    strncat(ch1,chstr1,i);
	//C is top-down, while c++ down-to up. 
	// cout will print before put
	puts(ch1); cout<< " @  " << i << " "; 
	//
	}
	string str1 ("Follow World");
	cout<< " word is " << str1 <<endl;
    cout << "The length of str1 is " << str1.length() << " characters.\n";
	return 0;
}