我收到编译错误"不是声明"对于这行代码:
parallel? stats[3]++ : stats[4]++;
无法理解为什么?!
答案 0 :(得分:4)
:运算符用于返回值不是if / else的完全替换,并且您没有返回值。但是要更好地解释完整错误是什么,并且不仅要发布您发布的行,还要更好地查看代码。
答案 1 :(得分:3)
引自this:
The following types of expressions can be made into a statement
by terminating the expression with a semicolon (;).
Assignment expressions
Any use of ++ or --
Method invocations
Object creation expressions
...
In addition to expression statements, there are two other kinds of
statements: declaration statements and control flow statements.
显然,您上面的代码行不属于上述任何类别。因此,编译器抛出错误。看看最外面的,而不是最里面的。