In visual studio Write a test program in c++ language that prompts the user to e

Question

In visual studio Write a test program in c++ language that prompts the user to enter an expression and displays the split items in reverse order.

1. Use the vector class from the standard template library.

2. Declare a string variable to store the expression input by the user

3. Write function split of type vector that is passed your expression

a. Your function will need a local string variable to “build” your number string

b. Loop through each character in expression.

i. If the character is a digit, append it to your number string

ii. If the character is not a digit and you have a number string with size > 0 store the number string in the vector, and erase the number string

iii. If the character is a space, add the next character (an operator) to the vector

c. After the loop, if the size of the number string is > 0, add it to the vector  

Explanation / Answer

Solution:

code:

#include<iostream>
#include<string>
#include<vector>

using namespace std;

vector<string> split(string line){
   vector<string> data;
   string num ="";
  
   for (int i = 0; i<line.size(); i++){
       if (line[i] >= '0' && line[i] <= '9'){
          num = num + line[i];
       }
       else if (line[i] != ' '){
           string s = "";
           s = s + line[i];
           data.push_back(s);
       }
       else {
           if (num.size() > 0){
              data.push_back(num);
              num = "";
           }
       }
   }
  
   return data;    
}

vector<string> splitreverse(string line){
   vector<string> data;
   string num ="";
  
   for (int i = line.size()-1; i>=0; i--){
     
       if (line[i] >= '0' && line[i] <= '9'){
          num = line[i] + num;
       }
       else if (line[i] != ' '){
           string s = "";
           s = s + line[i];
           data.push_back(s);
       }
       else {
          
           if (num.size() > 0){
              data.push_back(num);
              num = "";
           }
       }
   }
   if (num.size() > 0)
      data.push_back(num);
   return data;    
}

int main(){

   vector<string> data;
   string line;
   cout << "Enter an expression :";
   getline(cin,line);
  
   data = split(line);
   for (int i = 0; i<data.size(); i++){
       cout << data[i] << ",";
   }
   cout << endl;
  
   data = splitreverse(line);
   for (int i = 0; i<data.size(); i++){
       cout << data[i] << ",";
   }
   return 0;
}

I hope this helps if you find any problem. Please comment below. Don't forget to give a thumbs up if you liked it. :)

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