//testcpp.cpp  -- by tsaiwn@csie.nctu.edu.tw
// g++ testcpp.cpp
// true in C++ is actually 1
// false in C++ is actually 0
#include <stdio.h>
#include <iostream>
using namespace std;   // 用新寫法就要這樣 
int main( )  {
    bool t = true;
    cout << " t === "  << t << endl;
    printf(" t=%d\n", t);
    cout << " now doing ...  t = false; \n";
    t = false;
    cout << " t === "  << t << endl;
    printf(" t=%d\n", t);
    return 0; // C/C++ 規定要這樣 
}