错误信息 "error: a label can only be part of a statement and a declaration is not a statement" 表明在C语言代码中,标签(label)后面直接跟了一个声明(declaration),这是不允许的。在C语言中,标签只能用于语句的开始,而不能直接用于声明。 确定导致该错误的代码上下文 假设有以下错误的代码片段: c #inclu...
问题原因:switch中case里面的局部变量出错 解决方法:将case里面定义的局部变量在switch外面定义。 //报错情况switch(fork()) {case-1:error(1, errno,"fork");case0:// 子进程执行命令if(execvp(args[0], args) ==-1) {error(1, errno,"execvp"); }default:// 父进程等待子进程结束intwstatus;pid_tp...
在C 中避免 a label can only be part of a statement and a declaration is not a statement 错误的方法 现在,我们将讨论如何解决这个错误a label can only be part of a statement and a declaration is not a statement。 我们可以通过简单地在标签后面放一个分号来避免这个错误。 编译器会将分号视为空白...
error: a label can only be part of a statement and a declaration is not a statement 1. 如下代码报错: #include<stdio.h> int main() { int a; switch (a) { case 0: break; case 1: int aa; break; case 2: break; default: break; } return 0; } 1. 2. 3. 4. 5. 6. 7. 8...
用switch的时候发现一个错误 alabel can only be part of a statement and a declaration is not a statement 仔细观察以后发现是没有正确的加大括号引起的。 出错的代码如下 swtch(a) case'a': ... ... ... ... break; case'b': ... ... ... ... break; default: break; 然后编译的时候就会...
The “a label can only be part of a statement and a declaration is not a statement” error occurs in C when it encounters a declaration immediately after a label. The C language standard only allows statements to follow a label. The language does not group declarations in the same cate...
a label can only be part of a statement and a declaration is not a statement,在写代码的时候,变量的声明不应该出现在label之后,比如switch语句中的case结构也可能会遇到类似的问题。PS:从一个#if…#e
a label can only be part of a statement and a declaration is not a statement 如下会报错 label:inta=0; label的定位是一个语句,只能在非定义前面放着,解决的方法是使用一个空语句 label:;inta=0;
xxxxxxxxx.c:2697:5: error: a label can only be part of a statement and a declaration is not a statement struct v4l2_input input1; ^~~~ xxxxxxxxx.c:2698:5: error: expected expression before ‘int’ int index; ^~~ #问题分析 case...
如上所示code编译时候会报错,错误提示“a label can only be part of statement and a declaratioin is not a statement”。 问题原因: 引用一段话解释为“Prior to C99, all declarations had to precede all statements within a block, so it wouldn't have made sense to have a label on a declaratio...