Lexer and parser for advanced calculator (Flex + bison)
$30-250 USD
Closed
Posted about 2 years ago
$30-250 USD
Paid on delivery
It is necessary to develop the application in C or C ++ programming language, using tools
for developing lexers and parsers, which works as an advanced calculator. Calculator
calculates mathematical expressions line by line, while having the ability to store in
variables and calls of trigonometric functions. Calculator description:
• The print command is used to print the value of an expression.
• The types of data that can appear in expressions are strings and real
numbers,
• operations that can be performed with real numbers are addition, subtraction
less, multiplication and division (+, -, *, /) respecting the priority of multiplication and
divisions over the other two,
• It is possible to group expressions using pairs of parentheses (), [] and {} which are
they do not differ in functionality, but contribute to clarity
expression :
a = 56*([5 + 4.7 * (6-2/3) - 8.875] + 5.87)
print a
1515.453333
• there is an unary operator -, which denies the value of the expression.
print 10 + 20
20.000000
print -10 + 20
10.000000
print ---10
-10.000000
• The operation that can be performed with strings is the build, which it uses
operator &,
• If a string and expression are found in the operation, the expression must be evaluated and converted
him into his textual representation,
print "Temperature is" & 20 & "degrees
The temperature is 20.000000 degrees
print "Temperature is" & (20 * 9/5 + 32) & "Fahrenheit"
The temperature is 68.000000 Fahrenheit
• It is possible to use the functions of one argument sin, cos, sindeg and cosdeg which
calculate the sine and cosine of the angle in radians, ie degrees. Functions
can be used with or without parentheses around the argument, eg sin (0.456) and sin
0.456 are equivalent. When calling with parentheses, you may not specify an expression
inside parentheses. If we omit the brackets, only the number can be passed
or a variable as a parameter, not an entire expression.
print sin(90)
0.893997
print sindeg 90
1.000000
print sindeg(3*30)
1.000000
To remember the results of arithmetic expressions, as well as to use these values
in other expressions, variables of arbitrary name may be used (rule
naming as in C language). The variables are exclusively of the real number type. It's not
it is possible to store a string in a variable.
• Variables are assigned a value by the operator =.
• An assignment operation is also an arithmetic expression whose value is exactly
assigned value so that it is possible to write an expression that variables b
assigns a value of 3 and then assigns the same value to variable A:
foo_ = bar1 = 3
print foo_
3.000000
print bar1
3.000000
• The print command can also be used to print multiple values (expressions),
where values (expressions) are separated by commas (eg print var, 4, 5/10).
Each comma-separated value is printed in a new line on the standard
exit.
print foo_ + 5, "bar = " & bar1, 10.0
8.000000
bar = 3.000000
10.000000
The calculator takes all commands from the standard input. Anything that is not precisely specified
fictional or cannot be inferred from the example below, you can realize it arbitrarily,
but not to violate any of the above.
The implemented task should contain a Makefile that compiles
the program uses the make command and generates an executable file named calculator.
I CAN COMPLETE YOUR PROJECT EASILY
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Relevant Skills and Experience C,C++.
Hi,
I am an experienced C++ programmer (5 years). I have specialized in math, so this calculator will be no problem for me. I would love to work for You on this project and will deliver great results.
I will do the job for lower amount of money, due to the lack of rating on this platform, but I promise to deliver a great app in the end.
Sincerely Yours,
Konstantin