WebMay 4, 2024 · if语句被后面的分号提前结束,else无法与其匹配。. 而使用do {…}while (0)后就不会出错了,Linux内核中的宏定义很多都是这么用的:. 2. 避免定义空的宏时引 … WebApr 13, 2024 · 循环控制,控制程序重复执行若干次相同或似的逻辑,理解并正确使用循环控制,需要搞清楚循环的3个要素:起始值、变化量、终止条件。 起始值循环的起点,可以是【任意数据类型值】 变化量是指【改变起始值的方式】 终止条件【布尔类型值】,它是循环停止的边界while 循环 while,中文叫 当 ...
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http://c.biancheng.net/view/1810.html WebApr 26, 2024 · Python 中 while 循环的一般语法如下所示:. while condition: execute this code in the loop's body. 一个 while 循环将在一个条件为 True 时运行一段代码。. 它将一直执行所需的代码语句集,直到该条件不再为 … software engineer 1 - chandler garmin
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WebFeb 17, 2012 · 无限循环。. while 只有为假才跳出循环。. 在循环体内用if 语句判断是否达到条件,用break 调出循环。. 相同的还有一个while {},这个与上面那个不同的是,一个是先判断再执行,一个是先执行,再判断。. 通常用于消息循环用。. 或者是循环取值和阻滞状 … Do while loops check the condition after the block of code is executed. This control structure can be known as a post-test loop. This means the do-while loop is an exit-condition loop. However a while loop will test the condition before the code within the block is executed. See more In most computer programming languages a do while loop is a control flow statement that executes a block of code and then either repeats the block or exits the loop depending on a given boolean condition. The do while … See more is equivalent to In this manner, the do ... while loop saves the initial "loop priming" with do_work(); on the line before the while loop. As long as the … See more • Control flow • For loop • Foreach • Repeat loop (disambiguation) See more These example programs calculate the factorial of 5 using their respective languages' syntax for a do-while loop. ActionScript 3 See more • do {...} while (0) in C macros See more Web使用事项. while循环的语法为:while test command;do;done。; test command是测试条件的命令,可以是任何Linux命令或逻辑表达式。; while循环中的代码块必须用do和done包围。; 在循环内部需要使用变量时,变量名前必须加上$符号。; 当使用while循环读取文件时,要确保文件中没有特殊字符或格式问题。 software end of life database