#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
	//1. 條件運算子：not(!)
	int password = 356;
	bool a = (password == 123);
	if(!a)
		cout<<"你的帳號錯誤，無法登入"<<endl;
		
		
	//2. 條件運算子：元條件運算符號 ternary (?:)
	int age = 20;
	string txt;
	txt = (age >18 ? "已經成年" : "還未成年" );
	cout<<"age="<<age<<"，"<<txt<<endl;
	return 0;
}