calculator

Description:

There are many different types of calculators that are come with different Operating Systems. Many of these are fancy graphical calculators, xcalc in the Red Hat Linux environment for example.

You job is to write a simple text based calculator that take user keyboard input. The user should be prompted to enter the desired expression. The program will then parse the information into operands, and operators and then calculate the expression.

Requirements:

• The calculator should be able to handle the following operation: (,),^,/,*,+,-  (brackets, exponents, divide, multiply, add, subtract)
• The calculator should be able to handle integer numbers:  2 + 4 = 6
• The calculator should be able to handle real numbers (e.g. decimal numbers 2):  0.304 - .104 = 0.2
• The calculator should be able to handle negative number: 2 - -4 = 6
• The calculator should be able to handle equations are variable size, with NO limit.
• The delimiting character for the equation should be the carriage return, this means they press enter to calculate the desired expression

    Have the output look similar to this:

    -----------------------------------------------
    # Welcome to Tino's Calculator Program         #
    -----------------------------------------------
    #                                              #
    # This program will calculate a given          #
    # expression.                                  #
    #                                              #
    #  Enter the expression when prompted then     #
    #  hit the <ENTER> key to calculate.           #
    #                                              #
    # Legal Operators : (,),^,/,*,+,-              #
    # Legal Operands : Any number from the Real    #
    #                  number system. (This        #
    #                   includes negative numbers  #
    #                   and decimal numbers)       #
    #                                              #
    #----------------------------------------------#

    Please select a choice from the menu above :


    Please enter the expression 
    (8+2) * -0.23 +5
    The solution is 2.7

Additional/Optional Requirements:

•  Implement additional operators such as sin(), cos(), abs(),sqrt() (sine, cosine, absolute value, square root - hint sqrt(X) is equivalent to X^(1/2))
•  

Concepts:

• Classes and objects
• User Input/Output
• Pointers
• Stacks
• Algorithms (postfix Notation)
• Dynamic Memory Allocation

Updated: August 31, 2005 02:22 PM