1)　　Write a C++ program that receives a single letter and prints out the corresponding digit on the telephone. The letters and digits on a telephone are grouped this way: (30 points)

2= ABC 3 = DEF 4 = GHI 5 = JKL

6 = MNO 7 = PRS 8 = TUV 9 = WXY

No digit corresponds to either Q or Z. For these 2 letters your program should print a message indicating that they are not used on a telephone.

The program may operate like this:

Enter a single letter and you will get the corresponding digit on the telephone: R

The digit 7 corresponds to the letter R on the telephone

Another example:

Enter a single letter and you will get the corresponding digit on the telephone: Z

There is no digit on the telephone that corresponds to Z

NOTE: Your program should accept only uppercase letters (appropriate error message for special characters or lowercase letters)



Also write a loop that lets user to insert his/her letters, until the character (“$”) is entered.

-1)　　Write a C++ program that receives a single letter and prints out the corresponding digit on the telephone. The letters and digits on a telephone are grouped this way: (30 points)

2= ABC　　3 = DEF　 4 = GHI　　5 = JKL

6 = MNO　 7 = PRS　 8 = TUV　 9 = WXY

No digit corresponds to either Q or Z. For these 2 letters your program should print a message indicating that they are not used on a telephone.

The program may operate like this:

Enter a single letter and you will get the corresponding digit on the telephone: R

The digit 7 corresponds to the letter R on the telephone

Another example:

Enter a single letter and you will get the corresponding digit on the telephone: Z

There is no digit on the telephone that corresponds to　Z

NOTE: Your program should accept only uppercase letters (appropriate error message for special characters or lowercase letters)



Also write a loop that lets user to insert his/her letters, until the character (“$”) is entered.