读数组并保存。

#pragma warning(disable:4996)
#include <stdio.h>
#include <iostream>
#include <fstream>//文件读取头文件
#include <memory.h>
#include <algorithm>
#include <vector>//可变长数组
using namespace std;

int main()
{
fstream fin("E:\\test.txt");
vector<int> vec;//若读入数据是double类型：vector<double> vec;
if (fin)
{
int a;
while (fin >> a)
vec.push_back(a); //将数据输入数组
}
for (auto it = vec.cbegin(); it != vec.cend(); it++)//边长数组的循环
cout << *it << " ";
cout << endl;
system("pause");
return 0;

}
/*键盘输入*/
int main()
{
vector<int> vec;
int a;
while (cin >> a)
vec.push_back(a);
for (auto it = vec.cbegin(); it != vec.cend(); it++)
cout << *it << " ";
system("pause");
return 0;
}//待输入完毕，Ctrl+Z结束即可。