1.練習原始碼

#include "stdafx.h"
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	int x=2, y, z;
	x *= (y=z=5); cout << x << endl;
	z = 3;
	x == (y=z); cout << x << endl;
	x = (y==z); cout << x << endl;
	x = (y&z); cout <<
 
 x << endl;
	x = (y&&z); cout << x << endl;
	y = 4;
	x = (y|z); cout << x << endl;
	x = (y||z); cout << x << endl;
	return 0;
}

2.關鍵點分析

2.1 運算子作用

2.2 計算過程及答案

#include "stdafx.h"
#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
	int x=2, y, z;
	x *= (y=z=5); cout << x << endl;
	//2*5等於10
	z = 3;
	x == (y=z); cout << x << endl;
	//x沒有重新被賦值，還是10
	x = (y==z);
 
 cout << x << endl;
	//y和z相等都是3，邏輯判斷返回1，x等於1
	x = (y&z); cout << x << endl;
	//y和z相等都是3，0011&0011等於0011，還是3
	x = (y&&z); cout << x << endl;
	//y和z相等都是3都不為0，均為真，y&&z返回值1，x等於1
	y = 4;
	x = (y|z); cout << x << endl;
	//y是4，z是3，0100|0011=0111，x等於7
	x = (y||z); cout << x << endl;
	//y是4，z是3，均不為假，y||z返回1，x等於1
	return 0;
}