stringstream输入一行整数（有正有负）

#include <iostream>
#include <string>
#include <sstream>
using namespace std;


int count(string input){
	int count=0;
	for(int i=0;i<input.size();i++){
		if(input[i]==' ')
			count ++;
	
	}
	return count+1;
}


int main(){
string in;
	getline(cin,in);
	int n = count(in);
	stringstream stream;
	stream << in;
	
	int * input = new int[n];
	for(int i=0;i<n;i++){
		stream >> input[i];
	}
        return 0;
}