Leetcode - [Easy]13. Roman to Integer

leetcode.com/problems/roman-to-integer/

Roman to Integer - LeetCode

 

Solution

int romanToInt(char * s){
    int value = 0;
    int cur;
    int old = 4000;
    
    while(*s){              
        if(*s=='I') cur = 1;
        else if(*s=='V') cur = 5;
        else if(*s=='X') cur = 10;
        else if(*s=='L') cur = 50;
        else if(*s=='C') cur = 100;
        else if(*s=='D') cur = 500;
        else if(*s=='M') cur = 1000;       
        
        if(old < cur){
            value -= old;
            cur -= old;
        }
        
        old = cur;               
        value += cur;        
        
        s++;
    }
    
    return value;
}