WebSep 3, 2024 · 今天看代码时发现个不太理解的风格,一些代码都分段包含在了do {...}while (false)区间里。. 一般来说,使用do while是为了循环,但这里循环条件是false,根本就不会有循环,那么意义何在?. 上网查了下后得到结论:使用do {...}while (false)结构可以简化多 … WebFeb 25, 2024 · Explanation. statement is always executed at least once, even if expression always yields false. If it should not execute in this case, a while or for loop may be used.. If the execution of the loop needs to be terminated at some point, a break statement can be used as terminating statement.. If the execution of the loop needs to be continued at the …
do{}while(false)结构的妙用_c++ do while(false)_FesianXu …
Web質問に書かれているコードそのままだと do-while を用いるメリットはあまり無さそうですが、例えば「fuga()を実行するためには hoge1() 〜 hoge3() の全てに成功している必要がある」というようなケースだと利点があるように思えます。 元のコードを見ていないので憶測となりますが、後々にfuga()を ... WebJan 12, 2011 · The reason for this weird practice in #define's is to encapsulate the different assignments within a loop that is executed exactly once, so one may use the macro like a function. passover and jesus chart
c++ - Are do-while-false loops common? - Stack Overflow
WebJun 14, 2016 · Using this means that I can create localized variables that will go out of scope though just using brackets without the do { } while (false); does that as well. However I use the do while because I need the break; capability as well. I would consider using this style under some of the following conditions. If the business logic that is being ... Web执行流程: do...while语句在执行时,会先执行循环体; 循环体执行完毕以后,再对while后的条件表达式进行判断; 如果结果为true,则继续执行循环体,执行完毕继续判断,以此类推; 如果结果为false,则终止循环。 WebFeb 21, 2024 · Syntax. do statement while (condition); statement. A statement that is executed at least once and is re-executed each time the condition evaluates to true. To execute multiple statements within the loop, use a block statement ( { /* ... */ }) to group those statements. condition. passover and easter 2016