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- // Guess which symbol to use for derivative, integral, etc.
- #include "stdafx.h"
- #include "defs.h"
- void
- guess(void)
- {
- U *p;
- p = pop();
- push(p);
- if (find(p, symbol(SYMBOL_X)))
- push_symbol(SYMBOL_X);
- else if (find(p, symbol(SYMBOL_Y)))
- push_symbol(SYMBOL_Y);
- else if (find(p, symbol(SYMBOL_Z)))
- push_symbol(SYMBOL_Z);
- else if (find(p, symbol(SYMBOL_T)))
- push_symbol(SYMBOL_T);
- else if (find(p, symbol(SYMBOL_S)))
- push_symbol(SYMBOL_S);
- else
- push_symbol(SYMBOL_X);
- }
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