算法题

题目：序列 seq=[a,b,…,z,aa,ab,…,az,ba,bb,…,bz,…,za,zb,…,zz,aaa,…]类似于excel的字母序排列，任意给一字符串 s=[a-z]+(由a-z字符串组成的任意长度字符串)，请问s是序列seq的第几个字符串。

#define _CRT_SECURE_NO_WARNINGS#include<iostream>#include<cmath>using namespace std;int main(){char s[26] = { 'a', 'b', 'c', 'd', 'e' ,'f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};char str[100];cout << "获取字符串：";gets(str);int len = strlen(str);int count = len-1;int re = 0;for (int i = 0; i < len; ++i){for (int j = 0; j < 26; ++j){if (str[i] == s[j]){re += pow(26, count) * (j+1);count--;}}}cout << "返回结果：re=" << re << endl;return 0;}