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#include <iostream>
#include <cstring>      // for c-style string functions
#include <cctype>       // for character-based functions

using namespace std;    

int main()
{
    char first_name[20] {};
    char last_name[20] {};
    char full_name[50] {};
    char temp[50] {};
    
    cout << first_name;     // Will likely display garbage!

    cout << "Please enter your first name: ";
    cin >> first_name;

    cout << "Please enter your last name: ";
    cin >> last_name;
    cout << "-------------------------------" << endl; 
    
    cout << "Hello, " << first_name << " your first name has " << strlen(first_name) << " characters" << endl;
    cout << "and your last name, " << last_name << " has " << strlen(last_name) << " characters" << endl;

    strcpy(full_name, first_name);          // copy first_name to full_name
    strcat(full_name, " ");                 // concatenate full_name and a space
    strcat(full_name, last_name);           // concatenate last_name to full_name
    cout << "Your full name is " << full_name << endl;

    cout << "-------------------------------" << endl;
    cout << "Enter your full name: ";
    cin >> full_name;

    cout << "Your full name is " << full_name << endl;

    cout << "Enter your full name: ";
    cin.getline(full_name, 50); // Stops at 50 characters or enter
    cout << "Your full name is " << full_name << endl;

    cout << "-------------------------------" << endl;
    strcpy(temp, full_name);
    if(strcmp(temp, full_name) == 0)
        cout << temp << " and " << full_name << " are the same" << endl;
    else
        cout << temp << " and " << full_name << " are different" << endl;
        
    cout << "-------------------------------" << endl;
    

    for(size_t i{ 0 }; i < strlen(full_name); ++i) {
        if(isalpha(full_name[i]))
            full_name[i] = toupper(full_name[i]);
    }
    cout << "Your full name is " << full_name << endl;


    cout << "-------------------------------" << endl;
    if(strcmp(temp, full_name) == 0)
        cout << temp << " and " << full_name << " are the same" << endl;
    else
        cout << temp << " and " << full_name << " are different" << endl;

    cout << "-------------------------------" << endl;
    cout << "Result of comparing " << temp << " and " <<  full_name <<  ": " << strcmp(temp, full_name) << endl;
    cout << "Result of comparing " << full_name << " and " <<  temp <<  ": " << strcmp(full_name, temp) << endl;

    cout  << endl;
    return 0;
}