編譯時爲什麼我的變量報告爲「未聲明的標識符」？

Question

我有以下代碼：

 for(int iY=0;iY<(Height-YRemainder);iY=iY+16); 
     { 
      for(int iX=0;iX<(Width-XRemainder);iX=iX+16); 
      { 
       if(Operation==BLACKNESS) 
       { 
        Operation = WHITENESS; 
        PatBlt(DeviceContext, iX, iY, 16, 16, Operation); 
       } 
       else 
       { 
        Operation = BLACKNESS; 
        PatBlt(DeviceContext, iX, iY, 16, 16, Operation); 
       } 
      } 
      if(Operation == BLACKNESS) 
      { 
       Operation = WHITENESS; 
       PatBlt(DeviceContext, Width-XRemainder,iY,16,16,Operation); 
      } 
      else 
      { 
       Operation = BLACKNESS; 
       PatBlt(DeviceContext, Width-XRemainder, iY, 16, 16, Operation); 
      } 


     } 

當我編譯，我得到的報告針對每個PatBlt用於1x和1y未申報的標識符。我誤解了每個變量的範圍在這裏工作或者我錯過了什麼？

在此先感謝

Answer 1

你在的的發言到底是哪把他們變成單行語句半冒號：

for(int iY=0;iY<(Height-YRemainder);iY=iY+16); 

成爲

for(int iY=0;iY<(Height-YRemainder);iY=iY+16)