Write a C++ program that would implement the function called romanToInt which returns the integer equivalent of a given string s in Roman numeral. Roman numerals are represented by seven different symbols each with corresponding values: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1000. Roman numerals are usually written largest to smallest from left to right. However, the numeral for four is not IIII. Instead, the number four is written as IV. Because the one is before the five, we subtract it making four. The same principle applies to the number nine, which is written as IX. There are six instances where subtraction is used:
Problem:
Write a C++ program that would implement the function called romanToInt which returns the integer equivalent of a given string s in Roman numeral. Roman numerals are represented by seven different symbols each with corresponding values: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1000.
Roman numerals are usually written largest to smallest from left to right. However, the numeral for four is not IIII. Instead, the number four is written as IV. Because the one is before the five, we subtract it making four. The same principle applies to the number nine, which is written as IX. There are six instances where subtraction is used:
· I can be placed before V (5) and X (10) to make 4 and 9.
· X can be placed before L (50) and C (100) to make 40 and 90.
· C can be placed before D (500) and M (1000) to make 400 and 900.
ASSUMPTIONS
The given string s only contains the characters ('I', 'V', 'X', 'L', 'C', 'D', 'M')
It is guaranteed that s is a valid Roman numeral in the range [1, 3999]
TEST CASES:
romanToInt(‘III’) = 3
romanToInt(‘LVIII’) = 58
romanToInt(‘
Problem:
Write a C++ program that would implement the function called romanToInt which returns the integer equivalent of a given string s in Roman numeral. Roman numerals are represented by seven different symbols each with corresponding values: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1000.
Roman numerals are usually written largest to smallest from left to right. However, the numeral for four is not IIII. Instead, the number four is written as IV. Because the one is before the five, we subtract it making four. The same principle applies to the number nine, which is written as IX. There are six instances where subtraction is used:
· I can be placed before V (5) and X (10) to make 4 and 9.
· X can be placed before L (50) and C (100) to make 40 and 90.
· C can be placed before D (500) and M (1000) to make 400 and 900.
ASSUMPTIONS
The given string s only contains the characters ('I', 'V', 'X', 'L', 'C', 'D', 'M')
It is guaranteed that s is a valid Roman numeral in the range [1, 3999]
TEST CASES:
romanToInt(‘III’) = 3
romanToInt(‘LVIII’) = 58
romanToInt(‘MCMXCVI’) = 1996
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