C++中运算符有几种，作用和用法是什么?

这篇文章给大家分享的是C++中运算符的内容，C++中运算符有算术运算符、赋值运算符、比较运算符和逻辑运算符，下文将介绍它们的作用和用法，对大家学习C++有一定的帮助，文中介绍的非常详细，感兴趣的朋友接下来一起跟随小编看看吧。

运算符

作用：用于执行代码的运算

01 算术运算符

#includeiostream>
    
using namespace std;

int main1()
{
    
	//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;
     //两个整数相除，结果依然是整数，将小数部分去除
	int a2 = 10;
    
	int b2 = 20;
    
	cout  a2 / b2  endl;
    
	int a3 = 10;
    
	int b3 = 0;
    
	//cout  a3 / b3  endl;
     //错误，除数不可以为0
	double x1 = 0.5;
    
	double x2 = 0.22;
    
	cout  x1 / x2  endl;
    
	//取模
	int c1 = 10;
    
	int d1 = 3;
    
	cout  c1 % d1  endl;
    
	int c2 = 10;
    
	int d2 = 20;
    
	cout  c2 % d2  endl;
    
	int c3 = 10;
    
	int d3 = 0;
    
	//cout  c3 % d3  endl;
     //错误，取模除数不可以为0
	double x3 = 3.14;
    
	double x4 = 1.1;
    
	//cout  x3 % x4  endl;
     //错误，不支持小数取模运算
	//1.前置递增
	int m = 10;
    
	++m;
    
	cout  "m = "  m  endl;
    
	//2.后置递增
	int n = 10;
    
	n++;
    
	cout  "n = "  n  endl;
    
	//3.前置和后置的区别
	//前置递增：先让变量+1，后进行表达式运算
	int m2 = 10;
    
	int n2 = ++m2 * 10;
    
	cout  "m2 = "  m2  endl;
    
	cout  "n2 = "  n2  endl;
    
	//后置递增：先进行表达式运算，后让变量+1
	int m3 = 10;
    
	int n3 = m3++ * 10;
    
	cout  "m3 = "  m3  endl;
    
	cout  "n3 = "  n3  endl;
    
	system("pause");
    
	return 0;

}
    

02 赋值运算符

#includeiostream>
    
using namespace std;

int main2()
{
    
	//赋值运算符
	int a = 10;
    
	cout  "a = "  a  endl;
     //10
	// +=
	a += 2;
    
	cout  "a = "  a  endl;
     //12
	// -=
	a = 10;
    
	a -= 2;
    
	cout  "a = "  a  endl;
     //8
	// *=
	a = 10;
    
	a *= 2;
    
	cout  "a = "  a  endl;
     //20
	// /=
	a = 10;
    
	a /= 2;
    
	cout  "a = "  a  endl;
     //5
	// %=
	a = 10;
    
	a %= 2;
    
	cout  "a = "  a  endl;
     //0
	system("pause");
    
	return 0;

}
    

03 比较运算符

运算符术语示例结果==相等于4==30!=不等于4!=31小于430> 大于4> 31=小于等于4=30> =大于等于4> =31

#includeiostream>
    
using namespace std;

int main3()
{
    
	//比较运算符
	// ==
	int a = 10;
    
	int b = 20;
    
	cout  (a == b)  endl;
    
	// !=
	cout  (a != b)  endl;
    
	// >
    
	cout  (a >
     b)  endl;
    
	// 
	cout  (a  b)  endl;
    
	// >
    =
	cout  (a >
    = b)  endl;
    
	// =
	cout  (a = b)  endl;
    
	system("pause");
    
	return 0;

}
    

04 逻辑运算符

运算符术语示例结果!非!a如果a为假，则!a为真；如果a为真，则!a为假。& & 与a& & b如果a和b都为真，则结果为真，否则为假。||或a||b如果a或b有一个为真，则结果为真；二者都为假时，结果为假。

#includeiostream>
    
using namespace std;

int main4()
{
    
	//逻辑运算符 非 !
	int a = 10;
    
	cout  !a  endl;
     //0
	cout  !!a  endl;
     //1
	//逻辑运算符 与 &
    &
    
	int c = 10;
    
	int d = 10;
    
	cout  (c &
    &
     d)  endl;
     // 1
	c = 0;
    
	d = 10;
    
	cout  (c &
    &
     d)  endl;
     // 0
	c = 10;
    
	d = 0;
    
	cout  (c &
    &
     d)  endl;
     // 0
	c = 0;
    
	d = 0;
    
	cout  (c &
    &
     d)  endl;
     // 0
	//逻辑运算符 或 ||
	int e = 10;
    
	int f = 10;
    
	cout  (e || f)  endl;
     // 1
	e = 0;
    
	f = 10;
    
	cout  (e || f)  endl;
     // 1
	e = 10;
    
	f = 0;
    
	cout  (e || f)  endl;
     // 1
	e = 0;
    
	f = 0;
    
	cout  (e || f)  endl;
     // 0
	system("pause");
    
	return 0;

}
    

总结

关于C++中运算符的内容就介绍到这，上述示例具有一定的借鉴价值，感兴趣的朋友可以参考，希望能对大家有帮助，想要了解更多C++中运算符的内容的内容，大家可以关注其它的相关文章。

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