不好意思，上一个题解有错

#include <iostream>
#include <cstring>
#include <cstdio>
using namespace std;
void clearspace(){
    char s[200];
    string s1;
    gets(s);
    int len = strlen(s);
    for(int i = 0; i < len; i++){
        if(s[i] == ' ' and s[i - 1] == ' '){
            continue;
        }
        s1 += s[i];
    }
    cout << s1;
    return ;
}
int main(){
    clearspace();
    return 0;
}