一定要去除空格！！！！

解题思路:
去除空格后，忽略字母大小写，进行比较
注意事项:

参考代码:

#include<iostream>
#include<string>
#include<limits>
using namespace std;
string check( string  input) {
    string s ;
    
    for (int i = 0; i < input.size(); i++) {
        if (!isspace(input[i])){
            s+=input[i];

        }
    }
    return s;
}
int main(){
    string s1, s2;
    getline(cin, s1);
    getline(cin, s2);
    s1 = check(s1);
    s2 = check(s2);
    int bad = 1;
    for (int i = 0; i < max(s1.size(), s2.size()); i++) {
        s1[i] = tolower(s1[i]);
        s2[i] = tolower(s2[i]);
        if (s1[i] > s2[i]) {
            cout << ">" << endl;
            bad = 0;
            break;
        }
        else if (s1[i] < s2[i]) {
            cout << "<" << endl;
            bad = 0;
            break;
        }
        else if (s1[i] == '\0' && s2[i] != '\0') {
            cout << "<" << endl;
            bad = 0;
            break;
        }
        else if (s1[i] != '\0' && s2[i] == '\0') {
            cout << ">" << endl;
            bad = 0;
            break;
        }
    }
    if (bad) {
        cout << "=" << endl;
    }
    return 0;
}