i need help deciding the type of variable to use

hello and thanks in advance for helping (or even taking a look) I am making a program to calculate various physics problems and at the start of the program i would like the user to specify the are of physics that they're problem is in but how would i set up a variable that is words?

this is what i have so far:

Code:

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#include <iostream>
using namespace std;

int main()
{
    variable
   
    cout << "Welcome to the All in One Physics Calculator written by me!\n";
    cout << "to begin type area of physics that your problem is in.\n" << "\n";
    cout << " big 4 \n";
    cout << " projectile motion \n";
    cout << " collisions \n";
    cin >> variable;
   
   
   
    return 0;
}

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Use an integer.

Code:

---

#include <iostream>
using namespace std;

int main()
{
    int variable
   
    cout << "Welcome to the All in One Physics Calculator written by me!\n";
    cout << "to begin type area of physics that your problem is in.\n" << "\n";
    cout << "1) big 4 \n";
    cout << "2) projectile motion \n";
    cout << "3) collisions \n";
    cin >> variable;
   
   
   
    return 0;
}

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ok now i need help one more (and hopefully the last) time can a double type variable handle a number with no decimal or does there have to be a .0 at the end of integers?

A double can handle any natural numbers. That is, numbers with no decimal.

Quote:

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Originally Posted by Elysia

A double can handle any natural numbers. That is, numbers with no decimal.

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That's half true. It can handle natural numbers, but it can also handle numbers with decimals. (Just so there's no confusion)