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  • 算术运算符

    二元运算: +,-,*,/,%(取模或求余)

    一元运算符: ++num,--num,num++,num--

    int num1 = 10;

    int num2= ++num1+num1--;

    printf("num2=%d",num2);//22

    printf("num1=%d",num1);//10

    表达式

    如何计算

    结果 (num1=5)

    num2 = ++num1;

    num1 = num1 + 1;

    num2 = num1;

    num2 = 6;

    num1 = 6;

    num2 = num1++;

    num2 = num1;

    num1 = num1 + 1;

    num2 = 5;

    num1 = 6;

    num2 = --num1;

    num1 = num1 - 1;

    num2 = num1;

    num2 = 4;

    num1 = 4;

    num2 = num1--;

    num2 = num1;

    num1 = num1 - 1;

    num2 = 5;

    num1 = 4; 

    通过中间变量实现变量交换:

       int num1,num2;

       int temp;//中间变量

       printf("请输入的num1的值");

       scanf("%d",&num1);

       printf("请输入的num2的值");

       scanf("%d",&num2);

       printf("交换前num1=%d,num2=%d ",num1,num2);

       temp=num1;

       num1=num2;

       num2=temp;//通过中间变量实现交换

       printf("交换后num1=%d,num2=%d ",num1,num2);

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  • 原文地址:https://www.cnblogs.com/xiaomeng7/p/6592547.html
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