C语言-基础语法（三）：运算符

朴灿烈づ我的快乐病毒、 2023-10-04 12:11 25阅读 0赞

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## 一、算术运算符 ##

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### 1、 “+ - \* /” ###

int main()
    {
       
        
            int a = 10;
            int b = 20;
            int c = a + b;
            int d = a - b;
            int e = a *b;
            printf("%d %d %d\n",c,d,e);
            //两数相除,如果要得到小数,必须有一个是double类型或float类型
            //double f = a*1.0 / b;//0.5
            //int f = b / a;
            //int f = a / 0;err 除数不能为0
            printf("%lf\n",f);
            system("pause");
            return 0;
    }

### 2、 “%”：求个十百千位 ###

int main()
    {
       
        
            int  num = 8981234;
            int  a = num % 10;//个位
            int b = num / 10 % 10;//十位
            int c = num / 100 % 10;//百位
            int d = num / 1000 % 10;//千位
            printf("%d %d %d %d\n",

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