Question

By using the string function find to find the index of a space; the function length to find the length of the string; and the function substr from a file form firstname, middlename, and lastname to lastname, middlename, and first name. Please help me this is c++ thank you

Answer 1

Answer:

Note: Please make a file of name test.txt and store in the D drive or if you store at another place then change the PATH = "D:\test.txt"; in the given program to your's location.

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

const string PATH = "D:\test.txt";

string alterName(string fullName)
{
   string first_Name = "", middle_Name = "", last_Name = "";

   int comma_index = fullName.find(',', 0);
   last_Name = fullName.substr(0, comma_index);
   fullName = fullName.substr(comma_index + 2);
   int space_index = fullName.find(' ', 0);
   first_Name = fullName.substr(0, space_index);
   if (space_index != -1)
   {
       middle_Name = fullName.substr(space_index + 1);
   }

   string alteredName = first_Name + " ";
   if (!middle_Name.empty())
   {
       alteredName += middle_Name + " ";
   }
   alteredName += last_Name;
  
   return alteredName;
}

int main()
{
   ifstream name_file;
   name_file.open(PATH.c_str());

   while (name_file.good()) {
       string fullName;
       getline(name_file, fullName);
       string name = alterName(fullName);
       cout << name << endl;
   }
   getchar();
}

Output:

Please give thumbsup, if you like it. Thanks.