计算机考试-C循环—东方仙盟

Loop StructuresKey Point 1: The while Loop Statement(1) General Formc运行while(expression) loop bodywhileis a keyword in the C language.The expression immediately after it can be any legal expression in C. It serves as the loop condition to control whether the loop body runs.The loop body can be a single executable statement. If multiple statements need repeated execution, a compound statement should be adopted.(2) Execution Process ① Calculate the value of the expression inside the parentheses afterwhile. If the expression evaluates to non-zero, execute the embedded statements inside thewhilestructure. If the value equals zero, skip the wholewhilestatement and run other statements after this structure. ② Execute the embedded statements of the loop body. ③ Go back to Step ①. The loop terminates once the condition fails (the expression becomes zero).(3) Feature It judges the condition of the expression first, and then executes the statements.Key Point 2: The do-while Statement(1) General Formc运行do loop body while(expression);dois a C language keyword. It must be used together withwhileand cannot work independently.A do-while loop starts withdoand ends withwhile.The expression inside parentheses afterwhilecan be any legal C expression. It controls the execution of the loop, and the parentheses cannot be omitted.According to grammar rules, only one statement can exist betweendoandwhile. A compound statement is required to run multiple statements.(2) Execution Process ① Run the designated loop body statements for one time. ② After execution, judge the value of the expression afterwhile. When the expression is non-zero (true), the program returns to re-run the loop body statements. ③ Repeat the above steps until the expression evaluates to zero (false). At this point, the loop ends.(3) Feature It runs the loop body once first, and then judges whether the loop condition holds.Key Point 3: The for Statement(1) General Formc运行for(expression1; expression2; expression3) loop bodyThere are normally three expressions inside the parentheses. Parts or all of them can be omitted, but the two semicolons;cannot be removed.The expressions are separated by commas, and the parentheses cannot be left out.Grammatically, the loop body can contain only one single statement. If multiple statements need execution, use a compound statement.(2) Execution Process ① Calculate the value of expression 1. ② Calculate the value of expression 2. If it is non-zero (true), execute the embedded statements inside theforstructure, and then carry out Step ③. If it equals zero (false), exit the loop and run other statements after theforstructure. ③ Calculate the value of expression 3. ④ Repeat Step ②.Key Point 4: Nested Loops(1) Definition If a complete loop structure lies inside another loop structure, this is called nested loops. (2) All three types of loops mentioned above can be nested within each other. Loops can be nested in multiple layers, yet every layer of the loop must be logically complete.Key Point 5: Comparison of Different LoopsForwhileanddo-whileloops: The loop condition is specified afterwhile. The loop body must contain statements that help end the loop. Operations that make the loop finish can be placed inside expression 3 of aforloop.All tasks achievable bywhileloops can also be realized byforloops.Key Point 6: break Statement and continue Statement1. break Statement(1) Adding a semicolon afterbreakforms a complete break statement. The break statement can jump out from the inside of a loop, which means ending the loop in advance.专业术语汇总固定搭配loop structure 循环结构loop body 循环体expression 表达式keyword 关键字executable statement 可执行语句compound statement 复合语句embedded statement 内嵌语句nested loops 循环嵌套terminate the loop 终止循环jump out from the loop 跳出循环in advance 提前general form 一般形式execution process 执行过程人人皆为创造者共创方能共成长每个人都是使用者也是创造者是数字世界的消费者更是价值的生产者与分享者。在智能时代的浪潮里单打独斗的发展模式早已落幕唯有开放连接、创意共创、利益共享才能让个体价值汇聚成生态合力让技术与创意双向奔赴实现平台与伙伴的快速成长、共赢致远。原创永久分成共赴星辰大海原创创意共创、永久收益分成是东方仙盟始终坚守的核心理念。我们坚信每一份原创智慧都值得被尊重与回馈以永久分成锚定共创初心让创意者长期享有价值红利携手万千伙伴向着科技星辰大海笃定前行拥抱硅基 生命与数字智能交融的未来共筑跨越时代的数字文明共同体。东方仙盟拥抱知识开源共筑数字新生态在全球化与数字化浪潮中东方仙盟始终秉持开放协作、知识共享的理念积极拥抱开源技术与开放标准。我们相信唯有打破技术壁垒、汇聚全球智慧才能真正推动行业的可持续发展。开源赋能中小商户通过将前端异常检测、跨系统数据互联等核心能力开源化东方仙盟为全球中小商户提供了低成本、高可靠的技术解决方案让更多商家能够平等享受数字转型的红利。共建行业标准我们积极参与国际技术社区与全球开发者、合作伙伴共同制定开放协议 与技术规范推动跨境零售、文旅、餐饮等多业态的系统互联互通构建更加公平、高效的数字生态。知识普惠共促发展通过开源社区 、技术文档与培训体系东方仙盟致力于将前沿技术转化为可落地的行业实践赋能全球合作伙伴共同培育创新人才推动数字经济 的普惠式增长阿雪技术观在科技发展浪潮中我们不妨积极投身技术共享。不满足于做受益者更要主动担当贡献者 。无论是分享代码、撰写技术博客还是参与开源项目 维护改进每一个微小举动都可能蕴含推动技术进步的巨大能量。东方仙盟是汇聚力量的天地我们携手在此探索硅基 生命为科技进步添砖加瓦。Hey folks, in this wild tech - driven world, why not dive headfirst into the whole tech - sharing scene? Dont just be the one reaping all the benefits; step up and be a contributor too. Whether youre tossing out your code snippets , hammering out some tech blogs, or getting your hands dirty with maintaining and sprucing up open - source projects, every little thing you do might just end up being a massive force that pushes tech forward. And guess what? The Eastern FairyAlliance is this awesome place where we all come together. Were gonna team up and explore the whole silicon - based life thing, and in the process, well be fueling the growth of technology