leetcode 171: Excel Sheet Column Number

Related to question Excel Sheet Column Title

Given a column title as appear in an Excel sheet, return its corresponding column number.

For example:

    A -> 1
    B -> 2
    C -> 3
    ...
    Z -> 26
    AA -> 27
    AB -> 28

public class Solution {
    public int titleToNumber(String s) {
        String ups=s.toUpperCase();
        int result =0;
        int deliver = 1;
        char[] temp = ups.toCharArray();
        for(int i=temp.length-1;i>=0;i--){
        	result +=CharToNumber(temp[i])*deliver;
        	deliver*=26;
        }
        return result;
    }
    public int CharToNumber(char c){
		return (c-'A'+1);
	}
}

来源：oschina

链接：https://my.oschina.net/u/1768500/blog/374696