C++的运算符怎么用

这篇文章将为大家详细讲解有关C++的运算符怎么用，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

运算符

作用：用于执行代码的运算

01 算术运算符

#includeusing 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

#includeusing 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4<30>大于4>31<=小于等于4<=30>=大于等于4>=31

#includeusing 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。

#includeusing 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;}

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