It needs to be C++

PGM: Simple Calculator

The purpose of this assignment is to practice programming simple program I/O, use of variables and arithmetic expressions.

You are to build a calculator that accepts 2 double numbers and a string. These two numbers will be used in an arithmetic expression defined by the string. Both the expressions and result will be displayed to the screen.

NOTE: The input must be as follows: string number number This is a prefix expression

Output must repeat input the input in the following format:

Answer = arithmetic expression

Where

width of the field for the answer is 10 and it is right justified

= signs line up

Maximum decimal point length is 2

If the operator is not valid, output the statement Invalid expression

Arithmetic Expressions that must be defined are:

OPERATORS	Outputs the integer answer
+ addition	Int = number operator number
- subtraction
/ division
% modulus
* multiplication
COMPARATORS	Outputs string : True or False
== equality	String = number operator number
!= not equal
MATH FUNCTIONS	Outputs the integer or double result of the function call
^ first input raised to the power of the second	Int = pow(number, number)
< return minimum value	Int = min(number,number)
> return maximum value	int = max(number,number)
sqrt	Double = sqrt(number1) If this is given, do not attempt to read the 2nd number If this is processed in all, just ignore the second number
RUN ALL OPERATIONS	Returns the results for all operations listed
all