Question

input txt)

- - - + - - 50 31 54 v0 61 44 75

I have to read the above input txt in c++ to implement arithmetic expression tree. the v0 is a variable that we have to assign later. The headers we are allowed to use are as below.

#include <list>
#include <stack>
#include <queue>
#include <fstream>
#include <iostream>
#include <vector>

I really do not get how I should read the input.txt and store them. at first I tried to read them as string and convert them but I am not allowed to use string header. If I read the above input txt as char, it won't be able to store more than 2 digit integers. please help me

Answer 1

So to read the .txt file and its contents, we can use fstream class >> operator to read from the file word by word. So even a single character will be represented as a word and even a multi digit integer is a word. this way u can read anything word by word .

below is the code for that :