somehow这个代码没法判定x为空格 if(x==' ')

完整版

#include<bits/stdc++.h>
using namespace std;
int main(){
	char x=' ';
	string s="",curs="";
	int maxl=-1,curl=0;
	while(1){
		cin>>x;
		if(x==' '||x=='.'){
			cout<<"end of one word\n";
			printf("length %d\n",curl);
			if(curl>maxl){
				cout<<"bigger\n";
				maxl=curl;
				s=curs;
			}
			curs="a";
			curl=0;
			
		}
		else {
			curl++;
			curs+=x;
		}
		if(x=='.')break;
		
	}
	for(int i=0;i<maxl;i++){
		cout<<s[i];
	}
	return 0;
}