Description: The main function of this program is to use the list to the user to enter an arbitrary precision infix expression into postfix expression, in order to distinguish between data and operators, the data underscore between them separate, and this expression is calculated values. 2. Note that: This procedure is described in four arithmetic narrow and did not require the user to explicitly in brackets " []" or braces " {}" for input, as this will greatly increase the program the amount of code, for simplicity, and in order to achieve four mixed computing capabilities, as long as the user will contain the brackets or braces are in parentheses indicate the place can be.
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caculator.doc
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