题解 | #表示数字#还是用到了push——back 我的好兄弟

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

int main(void)
{
    int n=0,m=0;
    string str;
    char c;
    while(cin>>c)
    {
        if(c>='0'&&c<='9'&&n == 0&&m==0)
        {
            str.push_back('*');
            str.push_back(c);
            n = 1;
            m = 1;
        }
        else if(c>='0'&&c<='9'&&n == 0&&m==1)
        {
            str.push_back(c);
            str.push_back('*');
            n = 1;
            m = 1;
        }
        else if(c>='0'&&c<='9'&&n == 1)
        {
            str.push_back(c);
        }
        else{
            if(n==1)
                str.push_back('*');
            str.push_back(c);
            n=0;
            m=0;
        }
    }
    if(str[str.size()-1] >='0'&&str[str.size()-1] <='9')
    {
        str.push_back('*');
    }
    cout<<str;
}