//
//	File: cstring2.cpp
//
//	Goal: Test the concepts/usages of c-string
//
//

#include <iostream>

using namespace std;

int main()
{	// C++ string
	string str;

	// C-string: char. array with '\0' (NULL-char.) termination
	char str1[21];	// c-string str1
	
	// input
	cout << "Input for s-string: ";
	cin >> str1;	// c-string input

	// p.152, use strcopy for string assignment for C-string
	//	str1 = "John Wang";	// invalid for C-string
	strcpy(str1, "John Wang");
	str = "CS 212";			// valid for C++ string

	// debug
	system("clear");
	cout << "\n\nDebug C-string --- str1[1]: " << str1[1] << endl; 
	cout << "Debug C++ string --- str[0]: " << str[0] << endl; 

	// out
	// system("clear");		// clear screen
	cout << "C++ string: " << str << "\n";
	cout << "C-string: " << str1 << '\n';

	// String length (p.156): C++ string: str.length(); 
	//	C-string: strien(str1)
	cout << "Length for C++ string: " << str.length() << "\n"
		<< "Length for C-string: " << strlen(str1) << '\n';

	// comparison (p.156): C++: >, <, etc.; 
	//	C-string: strcmp(...)>0, <0, etc.
	// Q: Compare if str1 is greater than "VWC". if so, display "Yes"
	//	if no, display "No."
	if ( strcmp(str1, "VWC") > 0 )	cout << "Yes.";
	else	cout << "No.";

	cout << "\n\n\nDone.\n\n\n";
	return 0;
}