在while中使用cin>>a 为条件及注意事项说明

#include<iostream>
using namespace std;
int main()
{
	int currVal = 0 , val = 0;
	if(cin >> currVal)
	{
		int cnt=1;//统计次数
		while(cin >> val)
		{
			if(currVal == val)
			{
				cnt++;
			}
			else{
				cout << currVal <<" occurs "<<cnt<<" times "<<endl;
				currVal = val;
				cnt=1;//重新计算另一个 
			}
		} //while循环结束 
		cout << currVal <<" occurs "<<cnt<<" times "<<endl;//打印最后一个数 
	}//if循环结束 
	return 0;
}

while(cin>>a){
    ...
    if(cin.get()=='\n') break;
} 

#include <bits/stdc++.h>
using namespace std;
 
int b[10];
int main() 
{
	int i=0,a;
	while(cin>>a){
		b[i++]=a;
    	if(cin.get()=='\n') break;	
	} 
	for(i=0;i<10;i++) cout<<b[i]<<" ";
}

#include <bits/stdc++.h>
using namespace std;
struct ListNode {
	int val;
	ListNode *next;
	ListNode(int x) : val(x), next(NULL) {}
	
};
 
int main()
{
	ListNode* head1 = new ListNode(NULL);
	ListNode* head = new ListNode(NULL);
	head1 = head;
	int a;
	while (cin >> a) {
		ListNode* tmp = new ListNode(a);
		head->next = tmp;
		head = tmp;
		if (cin.get() == '\n') break;
	}
	while (head1->next != NULL) {
		cout << head1->next->val<<endl;
		head1 = head1->next;
	}
	system("pause");
	return 0;
}