in c please

In ancient Rome, the following symbols were used for numbers: This roman system is not positional like our numbering system. The symbols have fixed values regardless of where they appear in the number. For example, II is 2 and LXV is 50+ 10+5=65. However, adding a symbol before another can mean "subtract" if the symbol before is smaller. For example: IV means 4 (subtract 1 from 5) and CM means 900 (subtract 100 from 1000 ). Write a C program that prompts the user to enter a string representing a roman number and prints the equivalent decimal number Note: Assume the maximum size of the string is 100