if( strcmp(pszAccess,"rb+") == 0 || strcmp(pszAccess,"r+b") == 0
|| strcmp(pszAccess,"r+") == 0 )
pszAccess = "r+b";
else
pszAccess = "rb";
|| strcmp(pszAccess,"r+") == 0 )
pszAccess = "r+b";
else
pszAccess = "rb";
string1 == string2 ;
否则,都赋值"rb".
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大概意思是统一字符串pszAccess的值
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应该是读取二进制文件前的权限设定,如果有“+”则追加读,没有“+”只读,
但都是二进制文件的读取方法
"rb+","r+b","r+"都统一成"r+b"
其他的都是"rb"