练习1.17+1.18
没有重复值(最后要输入文件结束符跳出while循环)
有重复值
练习1.19
#include<iostream>
using namespace std;
int main()
{
int val1, val2;
cout << "Please input two integer:" << endl;
cin >> val1 >> val2;
int t;
if (val1 > val2)
{
t = val1;
val1 = val2;
val2 = t;
}
while (val1 <= val2)
{
cout << val1 << ' ';
++val1;
}
cout << endl;
return 0;
}