/*---------------------------------------------------------------------------------------
运算符
1.算数运算符
*/
int main()
{
	//加减乘除---------------------------------------------------------------------------
	int a1 = 10;
	int b1 = 3;

	cout << a1 + b1 << endl;
	cout << a1 - b1 << endl; 
	cout << a1 * b1 << endl;
	cout << a1 / b1 << endl;//两整数相除，结果依然是整数

	int a2 = 10;
	int b2 = 20;
	cout << a2 / b2 << endl;

	int a3 = 10;
	int b3 = 0;
	//cout << a3 / b3<< endl; //报错，两个数相除，除数不可以为0

	//两个小数可以相除
	double d1 = 0.5;
	double d2 = 0.22;
	cout << d1 / d2 << endl;//运算结果也可以为小数或整数

	//取模（取余）,两个小数是不能做取模运算的,除数不可为0
	cout << a1 % b1 << endl;

	//-----------------------------------------------------------------------------------
	//前置递增++
	int a = 10;
	++a;  //让变量加1
	cout << "a ="<< a << endl;

	//后置递增++
	int b = 10;
	b++;  //让变量加1
	cout << "b =" << b << endl;
	//前置和后置的区别:
	//前置递增，先让变量+1，然后进行表达式的运算
	int a5 = 10;
	int b5 = ++a5 * 10;
	cout << "a5 =" << a5 << endl;
	cout << "b5 =" << b5 << endl;//11,110
	//后置递增，先进行表达式的运算，然后让变量+1
	int a6 = 10;
	int b6= a6++ * 10;
	cout << "a6 =" << a6 << endl;
	cout << "b6 =" << b6 << endl;//11,100


	system("pause");
	return 0;
}

/*---------------------------------------------------------------------------------------
运算符
2.赋值运算符
*/
int main()
{
	// =
	int a = 10;
	a = 100;
	cout << "a=" << a << endl;
	// +=
	a = 10;
	a += 10;//a=a+2
	cout << "a=" << a << endl;
	// -=
	// *=
	// /=
	// %=
	system("pause");
	return 0;
}

/*-------------------------------------------------------------------------------------
运算符
3.比较运算符
*/
int main()
{
	// ==(相等于)
	int a = 10;
	int b = 100;
	cout << (a==b) << endl;
	// ！=（不等于）
	cout << (a!=b) << endl;
	// <
	// >
	// <=
	// >=
	system("pause");
	return 0;
}

/*----------------------------------------------------------------------------------
运算符
4.逻辑运算符
作用：用于根据表达式的值返回真值或假值
----------------------------------------------------------------------------------*/
int main()
{
	// 逻辑运算符 非 ！
	int a = 10;
	//在c++中除了 0 ，都为真
	cout << !a << endl;
	
	cout << !!a << endl;

	// 逻辑运算符 与 &&
	int a = 10;
	int b = 10;
	cout << (a&&b) << endl;

	a = 0;
	b = 10;
	cout << (a&&b) << endl;

	a = 0;
	b = 0;
	cout << (a&&b) << endl;
	// 同真为真，其余为假

	// 逻辑运算符 或 ||
	int a = 10;
	int b = 10;
	cout << (a||b) << endl;

	a = 0;
	b = 0;
	cout << (a||b) << endl;

	a = 0;
	b = 10;
	cout << (a||b) << endl;
	// 同假为假，其余为真

	system("pause");
	return 0;
}