Calculator Program

This calculator program evaluates mathematical expressions by following the PEMDAS order of operations. It utilizes the Shunting Yard algorithm to convert Infix notation 4.2+18/(9-3) to Reverse Polish notation 4.2 18 9 3 - / + before solving.

Supported Symbols

• Parentheses: (, )
• Operators:
  • ^ (exponentiation)
  • * (multiplication)
  • / (division)
  • + (addition)
  • - (subtraction)

Usage Examples

go-cli-calc 2+2*2
	OUTPUT: 6
	
go-cli-calc "4.2 + 18 / (9 - 3)"
	OUTPUT: 7.2

go-cli-calc "(1-.5)+2*9+2"
	OUTPUT: 20.5

NOTES

• Whitespace between numbers and operators will not affect the calculation
• You may be able to omit the quotes "" if there is no white space between the numbers and operators

Known issues

• Can't do -(2+2)