PTA L1-064估值一亿的AI核心代码

#include<bits/stdc++.h>
#define rep(i,s,e) for(int i=s; i<e; ++i)
using namespace std;
int main(){
    int _; cin>>_; getchar(); while(_--){
        string s; getline(cin,s); cout<<s<<"\nAI:";
        while(s[0]==' ') s.erase(0,1); int len=s.length();
        s=' '+s+' '; rep(i,1,len+1){
            if(s[i]!='I'&&isupper(s[i])) s[i]=tolower(s[i]);
            else if(!isalnum(s[i])&&s[i]!=' ') s.insert(i," "),s.insert(i+2,"*"),len+=2,i+=2;
        }
        while(s.find("?")!=string::npos) s.replace(s.find("?"),1,"!"); 
        while(s.find("  ")!=string::npos) s.replace(s.find("  "),2," "); 
        while(s.find(" I ")!=string::npos) s.replace(s.find(" I "),3," You "); 
        while(s.find("*I ")!=string::npos) s.replace(s.find("*I "),3,"*You "); 
        while(s.find(" me ")!=string::npos) s.replace(s.find(" me "),4," You "); 
        while(s.find("*me ")!=string::npos) s.replace(s.find("*me "),4,"*You "); 
        while(s.find(" can you ")!=string::npos) s.replace(s.find(" can you "),9," I can* "); 
        while(s.find("*can you ")!=string::npos) s.replace(s.find("*can you "),9,"*I can "); 
        while(s.find(" could you ")!=string::npos) s.replace(s.find(" could you "),11," I could ");
        while(s.find("*could you ")!=string::npos) s.replace(s.find("*could you "),11,"*I could ");
        len=s.length(); rep(i,0,len) if(s[i]=='Y') s[i]='y'; else if(s[i]=='*') s.erase(i,1),len--,i--;
        rep(i,2,len) if(!isalnum(s[i])&&s[i]!=' '&&s[i-1]==' ') s.erase(i-1,1),len--,i--;
        while(s[len-1]==' ') s.erase(len-1,1),len--;
        if(!len) cout<<' '; cout<<s<<'\n';
    }
}