proof of mathematical equation

[reshmidoudou]

I am new to c++ and have to write a program that takes a line of characters as its inout and represents a mathematical eqaution of the form a + b = c and checks whether it is correct. example 2 + 3 = 5 should report "CORRECT" whereas the equation 2 + 3 = 6 should report "INCORRECT". Please do help!

[r035198x]

I am new to c++ and have to write a program that takes a line of characters as its inout and represents a mathematical eqaution of the form a + b = c and checks whether it is correct. example 2 + 3 = 5 should report "CORRECT" whereas the equation 2 + 3 = 6 should report "INCORRECT". Please do help!

Being new is the best reason why you should try to write your own code. Let's start with the first thing: Do you know how to take input from the user?

[reshmidoudou]

Being new is the best reason why you should try to write your own code. Let's start with the first thing: Do you know how to take input from the user?

yes I know I have to use the CIN for input

I want to know how to do the equation on a single line. Shall I use the getline() and use strings or substrings

[reshmidoudou]

Being new is the best reason why you should try to write your own code. Let's start with the first thing: Do you know how to take input from the user?

I am doing it just want to confirm whether I'm doing right

[iknc4miles]

I am doing it just want to confirm whether I'm doing right

If you're using cin you'll probably take the entire equation in as a character array (char*). You'll need to break the equation up so that you keep your numbers and cast them as you want them (ints, doubles, floats....). Tokenizing is one way to do this, but may be a bit much for one line of text. Also find a way to keep the operator.

Once you have your numbers and operator, run your own check on the equation. If someone typed in 2+3 = 5, take 2 + 3 and compare the output with 5. If the user is always going to use integers, I suggest keeping your numbers as ints to prevent loss of information. If someone types 6.25 / 3.14159... = 2, you're probably going to need a range of acceptable answers because when the computer does the calculation, it will never come up with 2 unless you round your final answer to an int.

- Miles

[D_C]

cin should take out the whitespace. At that point, you use two integers and one char value.

You could input integer, character, integer 2, *do something*, character, integer2, *do something*.

[iknc4miles]

cin should take out the whitespace. At that point, you use two integers and one char value.

You could input integer, character, integer 2, *do something*, character, integer2, *do something*.

Ooops. D_C is right, forgot how easy cin is. Cin automatically tokenizes incoming character arrays by the white spaces and allows you to cast the values as they come in.

- Miles