need help.

[Ejay]

I have to make a lil program that does the following:
- Asks user to input a 10 digit number
- Checks that the inputted number is 10 digits no characters (numbers only)
- Extracts the first digit, 2nd and 3rd digits and the 4th to be used in an if statement.
Example: 4th digit can be either 1 or 0 (if there is a way to make the program only allow 1 or 0 that is great) if it's 1 then it will cout male, if yes then female.
ty

[Moschops]

Get input as a string. http://www.cplusplus.com/reference/string/string/
Check the size of it. http://www.cplusplus.com/reference/string/string/size/
Check each char in it is numeric. http://www.cplusplus.com/reference/cctype/isdigit/
Get each char that you want from it. http://www.cplusplus.com/reference/string/string/operator[]/
Create int values from char
https://stackoverflow.com/questions/13089953/convert-char-type-0-9-to-int-type-and-print-to-stdout-in-c-language#13090698
Do what you want with those int values.

[Ejay]

almost everything has worked (Thanks a lot Mochops) however the only thing that did not go well is extracting the 4th digit alone.

[Moschops]

Given a string containing many digits (as characters), here is how to get the 4th digit (as a character).

char digit = theString[3];

[Ejay]

char digit = ID[3];
  
  if(digit == 1)
  cout << "ID belongs to a male";
  else if (digit == 0)
  cout << "ID belongs to a female";
  else
  cout << "Invalid ID";

what's wrong with this?
if I do cout << digit; it returns 1 however the if function returns invalid of female doesn't return male.

[Moschops]

the if function returns invalid of female doesn't return male.

No idea what this means.

1 is the number 1. '1' is the character '1'. Since you're working with characters, you should be comparing with characters; not numbers.

[adam2016]

#include <iostream>
#include <sstream>

using namespace std;

int main()
{
    int number;
    startAgain:
    ostringstream convert;

    cout << "enter a number 10 digits long" << endl;
    cout << "4th number must be 0(female) or 1(male)" << endl;
    cin >> number;
    int store = 0;
    if(number < 10000000000 && number > 1000000000){

         store = number;
         cout << "the number you entered is :" << store << endl;

    }else{

        cout << "invalid number \n";
        goto startAgain;
    }

   string result;
   convert << store;
   result = convert.str();

   char check = result.at(3);
   if(check == '1'){

      cout << "male";
   }

   if(check == '0'){

    cout << "female";
   }
}

not too sure what you want this program to do but heres what I came up with it,look over it hope it helps