string4(const_cast)

※main.cpp파일

#include <iostream>

#include "string.h"



int main() {

	String s1;

	String s2 = "hello, world";     // String s2("hello,world");

	//String s2 = 0;						// NULL

	String s3 = s2;                 // String s3(s2);

	s1 = s2;

	

	String s4 = " IoT";

	s1 = s2 + s4;

	s1 = "hello, ";                 //String tmp("hello, ");

	

	if (s1 == s2) std::cout << "s1 and s2 are equal" << std::endl;

	else std::cout << "s1 and s2 are not equal" << std::endl;

	

	s4+= s4;

	s1 != s2;

	std::cout << "s1 : " << s1.c_str() << std::endl;

	std::cout << "s2 : " << s2.c_str() << std::endl;

	std::cout << "s2 len : " << s2.size() << std::endl;

	

	std::cout << "s3 : " << s3 <<std::endl;

	

	const String s5 = "hello";

	//s5 = "world";

	std::cout << "s5 len : " << s5.size() << std::endl;

	

	char *str = const_cast<char *>(s1.c_str()); // 상수성을 없앨 때 const_cast를 쓴다.

	

	return 0;

}