L1-064 估值一亿的AI核心代码 (20 分)

#include <bits/stdc++.h>
using namespace std;

string line, orign;


bool is_fuhao(char c) {
    return (!isspace(c) && !isalpha(c) && !isdigit(c));
}

bool is_duli(int s, int t, int limit) {

    return (((s == 0) || isspace(line[s - 1]) || is_fuhao(line[s - 1]))
                && ((t == limit) || isspace(line[t + 1]) || is_fuhao(line[t + 1])));
}

int find_duli(string s, int pos) {
    int idx;
    int len = line.length();
    while(pos < len && (idx = line.find(s, pos)) >= 0) {
        if(is_duli(idx, idx + s.length() - 1, len - 1))
            return idx;
        else
            pos += s.length();
    }
    return -1;
}

void replace_unit(string o, string t) {
    bool isUpdate = true;
    int pos = 0;
    while(pos < (int)line.length() && isUpdate) {
        isUpdate = false;
        int idx = find_duli(o, pos);
        if(idx >= 0) {
            line.replace(idx, o.length(), t);
            isUpdate = true;
            pos = idx + o.length();
        }
    }
}

void proc_replace() {
    replace_unit("I", "You");
    replace_unit("me", "You");
    replace_unit("can you", "I can");
    replace_unit("could you", "I could");
}

void del_blank() {
    bool isUpdate = true;
    while(isUpdate) {
        int len = line.length(), pos = 0;
        isUpdate = false;
        for(int i = pos; i < len; i++) {  // 结尾不会是空格，不会越界
            if(isspace(line[i]) && (isspace(line[i + 1]) || is_fuhao(line[i + 1]))) {
                line.erase(i, 1);
                pos = i;
                isUpdate = true;
                break;
            }
        }
    }
}

void to_lower_tanhao() {

    transform(line.begin(), line.end(), line.begin(), [](char c)->char {
              if(c == ‘?‘) return ‘!‘;
              else if(c == ‘I‘) return ‘I‘;
              return tolower(c);
    });

}

void input_and_trim() {

    getline(cin, orign);
    line = orign;

    if(!line.empty()) {
        line.erase(0,line.find_first_not_of(" "));
        line.erase(line.find_last_not_of(" ") + 1);
    }

}

int main() {

    int n;
    cin >> n;
    getchar();
    while(n --) {
        input_and_trim();
        to_lower_tanhao();
        del_blank();
        proc_replace();
        to_lower_tanhao();
        cout << orign << endl;
        cout <<"AI: "<< line << endl;
    }

}