Thread: c++ LOOP, HELP!

1.Write a program that will ask the user to input a hexadecimal number then convert and display the decimal equivalent of the hexadecimal number.

The program should process the program as many times as the user wants.





2. To make a telephone numbers easier to remember, some companies use letters to show their telephone number. For example, using letters, the telephone number 438-5626 can be shown as GET LOAN. Write a program that prompts the user to enter a telephone number in digits. Allow the user to use both uppercase and lowercase letters as well as space between words.

The program should process the program as many times as the user wants.

Code:

#include <iostream>

using namespace std;

int main()
{
main:
    char ch1;
    int num1;
    bool repeat;
    char yes;

    cout << "Enter your telephone number in letters." << endl;
    cin >> ch1;
    cout << "\n";

        for (int i=0; i < 7; i++)
        {
                switch (ch1)
                {
                    case 'A':
                    case 'B':
                    case 'C':
                    case 'a':
                    case 'b':
                    case 'c':
                            cout << "2";
                            cin >> ch1;
                            break;
                    case 'D':
                    case 'E':
                    case 'F':
                    case 'd':
                    case 'e':
                    case 'f':
                            cout << "3";
                            cin >> ch1;
                            break;
                    case 'G':
                    case 'H':
                    case 'I':
                    case 'g':
                    case 'h':
                    case 'i':
                            cout << "4";
                            cin >> ch1;
                            break;
                    case 'J':
                    case 'K':
                    case 'L':
                    case 'j':
                    case 'k':
                    case 'l':
                            cout << "5";
                            cin >> ch1;
                            break;
                    case 'M':
                    case 'N':
                    case 'O':
                    case 'm':
                    case 'n':
                    case 'o':
                            cout << "6";
                            cin >> ch1;
                            break;
                    case 'P':
                    case 'Q':
                    case 'R':
                    case 'S':
                    case 'p':
                    case 'q':
                    case 'r':
                    case 's':
                            cout << "7";
                            cin >> ch1;
                            break;
                    case 'T':
                    case 'U':
                    case 'V':
                    case 't':
                    case 'u':
                    case 'v':
                            cout << "8";
                            cin >> ch1;
                            break;
                    case 'W':
                    case 'X':
                    case 'Y':
                    case 'Z':
                    case 'w':
                    case 'x':
                    case 'y':
                    case 'z':
                            cout << "9";
                            cin >> ch1;
                            break;
                }
        }

            cout << "\n\nwould you like to repeat the operation? Y/N" << endl;
            cin >> yes;
            cout << "\n" << endl;
        if (yes == 'Y')
        {
           goto main;
        }
        else
        {
            goto end;
        }
end:
    return 0;
}

I don't know how to convert from numbers to letters T_T