为什么我不能循环这个程序

本文介绍了为什么我不能循环这个程序的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 #include <stdio.h>int main(void){int grade;unsigned int counter;int pass;int fail;pass = 0;counter = 1;do{while (counter <=10){printf("Enter student's result (1=pass, 2=fail)\n\n");scanf("%d", &grade);if (grade == 1) {pass = pass + 1;}counter = counter + 1;}if (pass > 8)printf("Good job instructor!\n");else printf("default\n");}while(1 != pass, 2 != fail);system("pause");return 0;} 我的尝试： 改进程序以验证其输入。在任何输入上，如果输入的值是 而不是1或2，则保持循环直到用户输入正确的值。What I have tried:Improve the program to validate its inputs. On any input, if the value entered isother than 1 or 2, keep looping until the user enters a correct value.推荐答案 }while(1 != pass, 2 != fail); 不是有效的声明。将变量放在运算符的左侧更好。is not a valid statement. And it is much better to put the variable to the left of the operator. }while(pass != 1 && fail != 2);其中&&表示AND：左边和右边的部分必须为true才能使整个条件成立。 Where "&&" means "AND": both the left and right parts must to true for the whole condition to be true.}while(pass != 1 || fail != 2);哪里||表示或：如果左侧和右侧中的任何一个为真，则整个条件为真。 逗号打破一个语句，结果将是右侧 - 左侧与返回值无关。Where "||" means "OR": if either one of the left and right hand sides is true, the whole condition is true.The comma "breaks" a statement, and the result will be the right hand side - the left hand side is irrelevant in the returned value. #include <stdio.h>int main(void){int grade;unsigned int counter;int pass;int fail;pass = 0;counter = 1;do{while (counter <=10){printf("Enter student's result (1=pass, 2=fail)\n\n");scanf("%d", &grade);if (grade == 1){pass = pass + 1;}counter = counter + 1;}if (pass > 8)printf("Good job instructor!\n");else printf("default\n");}while(1 != pass, 2 != fail);system("pause");return 0;} 专业程序员的编辑器具有此功能，其他功能包括括号匹配和语法高亮。 Notepad ++ Home [ ^ ] ultraedit [ ^ ] 建议：编写代码时使用一致的样式，它也有助于阅读。 建议：在使用之前初始化变量。你试图测试失败的价值，但你从来没有给它一个价值。 建议：不要在同一行上包装很多东西，它会让事情变得更加困难而没有任何优势。Professional programmer's editors have this feature and others ones such as parenthesis matching and syntax highlighting.Notepad++ Home[^]ultraedit[^]Advice: use consistent style when writing code, it also help reading.Advice: always initialize a variable before using it. you try to test the value of fail but you never gave it a value.Advice: di not pack many things on same line, it makes things more difficult to read without any advantage. 这篇关于为什么我不能循环这个程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！