raj457036 / simple-tools

This repo contains simple tools like clock, Calculator, etc.

Simple-Tools

This repo contains simple tools like clock, Calculator, etc.

Simple Calculator

Calculator

Simple Clock

Clock

Simple Infix to Postfix or Prefix convertor

Infix to Postfix or Prefix convertor

Simple Postfix and Prefix Evaluator

Simple Postfix and Prefix Evaluator

Simple FPS explainer

Random FPS

simple-tools's Issues

Wrong output

Hello Raj In Infix to postfix and prefix conversion part, Result of prefix expression are not correct.

For Example take this infix expression - (A^B)/DE/(F+A)(DE)-C
Your result : /^AB/DE-+FADEC
actual result should be : - * / * / ^ A B D E + F A * D E C

Reference of a converter site.
https://www.free-online-calculator-use.com/infix-to-prefix-converter.html

Incorrect output for any expression containing $

Pls fix your code for infix to postfix
'''
a$b$c--->abc $$
and not ab$c$
'''

Validation issue in Infix to Prefix/ Postfix

If we give any input that has mismatched parenthesis the page hangs and the code is stuck in an infinite loop, so I suggest to do some validation so that the page doesn't hang.

Infix to Postfix convertor gives wrong output

The algorithm used for the same is wrong. Try converting [a-b-c-d] and then try converting the output back to infix notation. It is easy to see that the potfix notation in the first place was wrong

Add spaces to prefix and postfix outputs.

When outputting a postfix and prefix expression, add spaces between numbers and operators.

Ex:
4 + 2 (infix)

4 2 + (postfix)
+ 4 2 (prefix)

Instead of

42+ (postfix)
+42 (prefix)

The reason:

For larger numbers, for example for the infix expression 342 + 723, the postfix and prefix are 342723+ and +342723, respectively. This makes it impossible to know which two numbers are being summed.

On another note, thank you for this tool! Helps me when studying!

major flow in infix to prefix convertor

bro you have a major flow in your infix to prefix convertor

suppose the infix notation is : (A-Z*(B+C)/D*E)+F
the expected prefix result should be : + - A * / * Z + B C D E F

but through your algorithm it is giving the result : +-AZ/+BCDEF

it is because when you traverse your code again you can see in prefix the same priority operator can be pushed without poping the existing operator so you need to fix this thing.

Cannot evaluate for power operator (^)

1^1 should be 1. If you treat '^' as power operator, but its coming 0, so maybe it is XOR operator.
But change it to power operator.

Wrong output with Infix->Postfix evaluation

The output for converting from infix to postfix expression for some cases is producing a wrong output. Like in this case

But the expected output for this is supposed to be

The flaw in your algorithm is that

Over here in your code, we can see that it is pushing the + operator into the stack eventhough there is a (-) operator in there, it is supposed to pop out the( - )operator first and then push in the + operator into the stack.

BUG:Unable to solve expressions

When * is scanned after parenthesis it append * directly.