开始忘记转换str-‘0’了

改之后居然直接出了结果——235

是我没想到的 嘻嘻（希望明天也有这样的好运）

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>

using namespace std;

const int months[]={0,31,28,31,30,31,30,31,31,30,31,30,31};

const int number[]={5, 6, 8, 6, 9, 1, 6, 1, 2, 4, 
                    9, 1, 9, 8, 2, 3, 6, 4, 7, 7,
                    5, 9, 5, 0, 3, 8, 7, 5, 8, 1, 
                    5, 8, 6, 1, 8, 3, 0, 3, 7, 9, 
                    2, 7, 0, 5, 8, 8, 5, 7, 0, 9, 
                    9, 1, 9, 4, 4, 6, 8, 6, 3, 3,
                    8, 5, 1, 6, 3, 4, 6, 7, 0, 7,
                    8, 2, 7, 6, 8, 9, 5, 6, 5, 6,
                    1, 4, 0, 1, 0, 0, 9, 4, 8, 0, 
                    9, 1, 2, 8, 5, 0, 2, 5, 3, 3};

int is_leap(int year){
    if(year%4==0&&year%100||year%400==0) return 1;
    return 0;
} 

int get_days(int year,int month){
    if(month==2) return 28+is_leap(year);
    return months[month];
}

bool check(int y,int m,int d){
    if(m<0||m>12) return false;
    if(d<0) return false;
    if(d>get_days(y,m)) return false;
    return true;
}

int main(){
    char str[8];
    int res=0;
    for(int m=1;m<=12;m++){

        for(int d=1;d<=31;d++){
            if(check(2023,m,d)){
                sprintf(str,"%04d%02d%02d",2023,m,d);

                for(int i=0,k=0;k<8&&i<100;i++){
                    if(number[i]==str[k]-'0') k++ ;
                    if(k==8){
                        res++;
                        continue;
                    }
                }

            }
        }
    }

    cout<<res<<endl; 
    return 0;
}