WebFeb 25, 2024 · Note that any init-statement must end with a semicolon ;, which is why it is often described informally as an expression or a declaration followed by a semicolon.: condition - any of the following: an expression, in this case the value of condition is the value of the expression ; a declaration of a single non-array variable of such type with a brace … Web最佳答案. 在现代处理器上，其中很多都归结为分支预测。. 虽然 switch 语句可以实现为一个跳转表，它执行代码的任何分支所花费的时间大致相同，但它通常也是相当不可预测的——从字面上看；分支预测器在预测采用哪个分支方面通常做得很差，这意味着很有 ...
Switch Statement in C++ - GeeksforGeeks
Web工作原理: switch 表达式计算一次; case 将表达式的值与每种情况的值进行比较; 如果存在匹配项，则执行关联的代码块; break 和 default 关键字是可选的，将在本章后面介绍; 下面的示例使用工作日编号来计算工作日名称： Webin your if loop. Very big difference if you fix that. I believe that putting the statement inside the switch statement provokes the compiler into sending the value directly into the CPU … ready hydraulic schematic symbols
C++ switch 语句 菜鸟教程
WebMar 20, 2024 · Working of switch Statement in C++. The working of the switch statement in C is as follows: Step 1: The switch expression is evaluated. Step 2: The evaluated value is then matched against the present case values. Step 3A: If the matching case value is found, that case block is executed. Step 3B: If the matching code is not found, then the ... WebApr 11, 2024 · Switch statements are a control flow construct in C++ used to execute different code blocks based on the value of a specific variable or expression. They … Webswitch 语句必须遵循下面的规则：. switch 语句中的 expression 必须是一个整型或枚举类型，或者是一个 class 类型，其中 class 有一个单一的转换函数将其转换为整型或枚举类型 … ready hour 1 week food supply