scientific calculator emulator

/* Name: scientific calculator (four arithmetic operations of floating-point numbers with parentheses can be implemented) Copyright: Author: Date: 15-09-14 Description: reads a computing expression from a file, converts the computing expression to an inverse polish expression, computes the value of the inverse polish expression, and finally outputs the answer. */ # Include # Include # Include # Include

The code address is as follows:Http://www.demodashi.com/demo/13751.html Project descriptionPure HTML+CSS+JS implements a scientific calculator, supports basic functions such as square root exponent logarithm, supports keyboard input, has simple and advanced two modesFile structurePure HTML+CSS+JS Implementation, the file structure is very simple, on three files.Demo effectExperimental design T

the sequence is evaluated. No additional instructions need to be considered. The temporary (local) variable corresponds to the stack, and the stack requires only Push/pop control access. Note that the problem of expression evaluation has no complex control flow and no new variable for dynamic heap allocation, which is much simpler than the syntax analysis of a common programming language. Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

About output: By default, the data is displayed in the natural writing format, and the calculation result is displayed in the score format. For example, 0.5x0.5 is displayed as = 1/4. Although intuitive, it is slightly inconvenient to measure and estimate. Use Shift --> mode (that is, setup ), Select 1. Input and Output (Natural Writing type. Io is input output ), Then, the display method of the calculation result is displayed. Select 2. Lineo (linear output, O or output) Then, it is easy

Like many netizens, benefited from vckbase, feel should make a point for him to contribute, so did so a scientific calculator based on expression evaluation and you love programming friends to share. As you know, there are a lot of procedures in this area, and I've seen Zf.yi works, I have also seen Huangjiang related programs, but I think my computing class has a different feature than two digits, such as