原题描述
Given an integer, convert it to a roman numeral.
Input is guaranteed to be within the range from 1 to 3999.
算法
常量数组转化表进行匹配
int Num[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
string Roman[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
C++代码
class Solution {
public:
/*
题意：将数字转换成罗马数字
对照转换表模拟即可
*/
string intToRoman(int num) {
int Num[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
string Roman[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
string ans = "";
int i = 0, times;
while (num) {
times = num / Num[i];
num %= Num[i];
while (times--) ans += Roman[i];
i++;
}
return ans;
}
};
Bug Free Procedure 从记事本直接写代码
2016.12.06 变量未定义
1. 用于指示转换数组位置的变量$i$没有定义