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Why is 'a=GetIntArg (top_estack);' wrong? |
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Q: |
What is wrong in doing
a = GetIntArg (top_estack);It seems that it works fine, but you always use an auxilary variable... |
A: |
It works fine sometimes, but not always. See, GetIntArg
is a function-looking macro, with changes the value of its actual
argument. So, if you write
a = GetIntArg (top_estack);you will also change the value of TIOS system variable top_estack, and I am not sure that you really want this. So, I strictly recommend using an auxilary variable, like in the following example: ESI argptr = top_estack; ... a = GetIntArg (argptr);Using this method, you will avoid unexpected changes of top_estack. |