Write a C++ program that converts a Roman number to its decimal number representation. Roman numerals whose decimal representations are integers between 1 and 3,999.

Ex format:

Enter Roman Num: MCMLXXVIII

Roman Num to Integer: 1987

Use string datatype, no char. Function declaration should be used like: value(input.substr(0, 1))

Not like value(input[0])

(No using stdafx.h)

First write a function that yields the numeric value of each of the letters:

• I=1

• V=5

• X = 10

• L = 50

• C = 100

• D = 500

• M = 1,000