[求助]：关于判断键盘输入问题

黄玮

我想在CAD命令行中实现如下功能：选择参数：半径（R），直径（D）：，如果键盘输入的是R就实现半径的功能，如果键盘输入的是D，就实现直径功能。我是这样实现的，
char input[10];
acedGetKword(“选择参数：半径（R），直径（D）”，input);
if(strcmp(input,"R") == 0)
{};
if(strcmp(input,"D")==0)
{};
但是我怎么输入R,D都没有反映，都说是无效的输入？
不知道我哪里有问题，要怎么样才能实现这个功能？

masterhe

int

acedGetKword(

const char * prompt,

char * result);

prompt Optional prompt string that acedGetKword() displays before it pauses, or null for no prompt
result Pointer to the result buffer that holds the entered keyword (maximum 131 characters)

Gets user input for a keyword.

The AutoCAD user can enter the keyword from the keyboard. The list of keywords that acedGetKword() accepts is set by a prior call to acedInitGet(). If the user enters a string not specified in the call to acedInitGet(), AutoCAD displays an error message and tries again (and redisplays prompt, if one was specified). If the user types only [Return], acedGetKword() returns an empty string ("") unless the call to acedInitGet() also disallowed null input.

The user cannot respond to acedGetKword() by entering an AutoLISP expression.

The acedGetKword() function does not return RTKWORD. The RTKWORD value is used only as a status (or error) code that is returned by other user-input (acedGetXxx()) functions such as acedGetInt().

The acedGetKword() function returns one of the following: RTNORM if it succeeds, RTERROR if it fails, or RTCAN if the user cancels the request (by entering [Ctrl]+[C]). It returns RTMODELESS, if the active command was registered using the ACRX_CMD_INTERRUPTIBLE flag and the document has received a modeless interrupt signal from a call to AcApDocManager::sendModelessInterrupt(). The prior call to acedInitGet() can also enable a return value of RTNONE (if the user enters a null response or arbitrary input).

Include File
acedads.h