C警告：声明不起作用 [英] C Warning: Statement with no effect

问题描述

  gcc -pedantic -Wall -ansi 
  

我收到警告：警告：没有效果的语句

引用此行：

pre $ for（currentDirection; currentDirection< = endDirection; currentDirection ++）


任何人都可以帮我解决这个问题吗？解决方案

b

  for（; currentDirection< = endDirection; currentDirection ++）
  

或者，如果您忘记初始化变量：

$ p $ for（currentDirection = 0; currentDirection < = endDirection; currentDirection ++）


When trying to compile my prgram with:

gcc -pedantic -Wall -ansi 

I get the warning: warning: statement with no effect

Referring to this line:

for(currentDirection; currentDirection <= endDirection; currentDirection++)

Can anyone help me with this?

解决方案

currentDirection; does nothing.

Replace your line with

for(; currentDirection <= endDirection; currentDirection++)

Or, in case you just forgot to initialize the variable:

for(currentDirection = 0; currentDirection <= endDirection; currentDirection++)

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