프로그래머스 숫자문자열과영단어 c++ // 문자열, regex_replace 사용법

https://school.programmers.co.kr/learn/courses/30/lessons/81301/solution_groups?language=cpp

프로그래머스

1. regex_replace 사용법

s=regex_replace(대상문자열, regex("찾는문자열"), "대체할문자열"); //대체된 문자열을 반환함

 

2. 내 답안(노가다)

#include <bits/stdc++.h>

using namespace std;

int solution(string s) {
    string answer = "";
    for(int i=0;i<s.size();++i){
        if(s[i]>='0' && s[i]<='9') {
            answer+=s[i];
        }
        if(s[i]=='z'){
            answer+='0';
            i+=3;
        }
        else if(s[i]=='o'){
            answer+='1';
            i+=2;
        }
        else if(s[i]=='t' && s[i+1]=='w'){
            answer+='2';
            i+=2;
        }
        else if(s[i]=='t' && s[i+1]=='h'){
            answer+='3';
            i+=4;
        }
        else if(s[i]=='f' && s[i+1]=='o'){
            answer+='4';
            i+=3;
        }
        else if(s[i]=='f' && s[i+1]=='i'){
            answer+='5';
            i+=3;
        }
        else if(s[i]=='s' && s[i+1]=='i'){
            answer+='6';
            i+=2;
        }
        else if(s[i]=='s' && s[i+1]=='e'){
            answer+='7';
            i+=4;
        }
        else if(s[i]=='e'){
            answer+='8';
            i+=4;
        }
        else if(s[i]=='n'){
            answer+='9';
            i+=3;
        }
    }
    return stoi(answer);
}

3. 모범답안

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

int solution(string s) {
    s = regex_replace(s, regex("zero"), "0");
    s = regex_replace(s, regex("one"), "1");
    s = regex_replace(s, regex("two"), "2");
    s = regex_replace(s, regex("three"), "3");
    s = regex_replace(s, regex("four"), "4");
    s = regex_replace(s, regex("five"), "5");
    s = regex_replace(s, regex("six"), "6");
    s = regex_replace(s, regex("seven"), "7");
    s = regex_replace(s, regex("eight"), "8");
    s = regex_replace(s, regex("nine"), "9");    
    return stoi(s);
}