Write a function whose prototype is
string NumberToName(int x);
that returns the string of english name of each digit of number x.
Using this function, write a main program that reads a positive integer number and prints the
english name of each digit of that number in a single line as demonstrated in the following examples.
Enter a positive integer: 16903
16903 ==> ONE SIX NINE ZERO THREE
Enter a positive integer: 407
407 ==> FOUR ZERO SEVEN
how writting this program in c++??????