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C 为什么我的变量报告为；“未声明的标识符”；什么时候编译？_C_Variables_Scope - Fatal编程技术网
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C 为什么我的变量报告为；“未声明的标识符”；什么时候编译？

c variables

C 为什么我的变量报告为；“未声明的标识符”；什么时候编译？,c,variables,scope,C,Variables,Scope,我有以下代码： 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

我有以下代码：

       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);
            }


        }

for（int iY=0；iY在for语句的末尾有分号，将它们转换为单行语句：


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



for（int-iY=0；iY

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