hello
i need to do a task in c++ and i am asked to write a c++ program to get n number (as string because they are big numbers) and calculate n operation on them
something like this: 2542585 * 12555 - 1257 + 45458 / 487525
and also it is necessary to prefix,infix and postfix be concluded in the program .
would you please help me?
thanks the best
Looks like someone want to have her homework done by the research community... I'm sure you can fid what you want on Slashdot as it is not a research question.
it seems an assignment problem, you are posting it to wrong problem, most of here belongs to the other side, teachers.
I wondered about the "homework" aspect. It is a rather large assignment.
There are command-line calculators that use big numerals already. It would be good to find one of those as a check on any results produced by a new effort and for experimenting with formulas. There are also libraries that provide arithmetic with arbitrary integers and exact rationals. Better yet, there are programming languages that provide that as the basic arithmetic. These are good for working test cases even if your work must be in C++.
I also wonder how under-specified the task might be. For example, how are the results of divisions to be portrayed? Are the inputs always exact integers? Are parentheses allowed for nesting in formulas?
If this is part of an introductory programming course, I am puzzled by an assignment such as this.
I see that there are similar questions on this topic. In all cases, I suggest that the Boost library support for multiple-precision working be considered.
Lo más probable es que hagas tu propia calculadora... qué reciba cadenas validados que sean sólo números.. es decir trabajar en códigos ascii, ir multiplicando manualmente, es decir de cada uno (carácterMultiplicando-'0')*(caracterMultiplicador-'0'), a ese resultado ir poniendo en otrabajar cadena (resultado %10) y el sobrante (resultado/10) irlo sumando al siguiente resuktado
The C ++ library muparser(http://beltoforion.de/article.php?a=muparser) allows you to release what you need very easily.
I would locate two possible directions in solving the issue:
1. pre-convert any string-written numbers into arithmetic values, defining a correspondence table for operations execution order (included their priority,), performing arithmetic calculation and finally re-convert the result in string form
2. define a set of 'macros' consisting of arithmetic operations between string-form-numbers and applying them to the sequence of operations inputted to the program.
C++ makes available powerful tools to achieve both the directions I proposed
There are many useful suggestions among the remarks here. They demand a certain level of sophistication and experience. As interesting as it is to apply these, it strikes me that academic Zareie has not provided enough context to indicate the level of the course of study and presumed knowledge of methodologies. It would be useful to learn what Zareie makes of all this.
[Side Notes: I confess I am intrigued by the idea of working in decimal throughout and applying a straightforward operator-precedence parsing with pushdown operator and operand stacks. The only trickiness is for operators that can appear in unary as well as binary positions. This is akin to what my old TI-52 calculator provided https://en.wikipedia.org/wiki/TI_SR-50 although it limited numeric precision yet accepted "algebraic" notation :).
The question of fractions and how to handle them remains open. It seems to call for at least fixed-point handling, (or even scientific notation) which is a bit more involved for the arithmetic operations, but not so much for the parsing and ordering of the arithmetic. That can be modularized and resolved separately. The calculation implementation (and conversion of numeric terms to/from internal forms) can be separated from the overall parsing and evaluation order, encapsulating the choice of arithmetic methods. OOP helps.]
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