文件名称：prints out the corresponding digit on the telephone
文件大小：3KB
文件格式：CPP
更新时间：2015-03-28 20:26:41
C++
Write a C++ function 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: 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. program should accept only uppercase letters (error message for special characters or lowercase letters)