题解 | #简单密码#哈希表

#include<iostream>
#include<unordered_map>
using namespace std;

int main()
{
    unordered_map<char, int> mp={{'a',2},{'b',2},{'c',2},
                                      {'d',3},{'e',3},{'f',3},
                                      {'g',4},{'h',4},{'i',4},
                                      {'j',5},{'k',5},{'l',5},
                                      {'m',6},{'n',6},{'o',6},
                                      {'p',7},{'q',7},{'r',7},{'s',7},
                                      {'t',8},{'u',8},{'v',8},
                                      {'w',9},{'x',9},{'y',9},{'z',9}};
    string str;
    cin>>str;
    string ans;
    for(char ch: str)
    {
        if(ch>='a'&&ch<='z')
        {
            ch = '0'+ mp[ch];
        }
        else if(ch>='A'&&ch<='Z')
        {
            if(ch=='Z')
                ch='a';
            else
                ch=tolower(ch)+1;
        }
        ans += ch;
    }
    cout<<ans;
    return 0;
}