C++从键盘读入数组并存储

//读取指定长度的数组
int main()
{
int n = 0;
cin >> n;
vector<int> p(n);
for (int i = 0; i < n; i++) {
cin >> p[i];
}for (int i = 0;i < p.size();i++)
{
cout << p[i];
}
cout << endl;
system("pause");
}//从键盘读入任意长度的数组
int main()
{
vector<int>nums;
int num = 0;
do {
cin >> num;
nums.push_back(num);
} while (getchar() != '\n');for (int i = 0;i < nums.size();i++)
{
cout << nums[i];
}
cout << endl;
system("pause");
return 0;
}//键盘输入字符串类型的整数，然后将其输出数组中
int main()
{
string str, temp;
getline(cin, str);
int i = 0;
vector<int> p;
stringstream input(str);
while (input >> i) {
p.push_back(i);
}
for (int i = 0;i < p.size();i++)
{
cout << p[i];
}
cout << endl;
system("pause");
return 0;
}