LeetCode题组：第13题-罗马数字转整数

#include<stdio.h> 

//函数申明
int romanToInt(char *s); 

int romanToInt(char * s){
    int count = 0;
	while (*s){
		if (*s == 'V')         count += 5;
		else if (*s == 'L')    count += 50;
		else if (*s == 'D')    count += 500;
		else if (*s == 'M')    count += 1000;
		else if (*s == 'I')
			count = (*(s + 1) == 'V' || *(s + 1) == 'X') ? count - 1 : count + 1;
		else if (*s == 'X')
			count = (*(s + 1) == 'L' || *(s + 1) == 'C') ? count - 10 : count + 10;
		else
			count = (*(s + 1) == 'D' || *(s + 1) == 'M') ? count - 100 : count + 100;
		s++;
	}
	return count;
}

int main(){
	char *s = "IV";
	printf("%d\n",romanToInt(s));
	return 0;
}