请问，编译这个小程序时应该怎么输入什么呢？

Question

#include
#include**

using namespace std;

int main()
{
vector ivec;
int ival;
while ( cin >> ival )
ivec.push_back( ival );

// we could have calculated the sum as we entered the
// values, but the idea is to iterate over the vector ...
int sum = 0;
for ( int  ix = 0; ix < ivec.size(); ++ix )
    sum += ivec[ ix ];
int average = sum / ivec.size();
cout << "Sum of " << ivec.size()
    << " elements: " << sum
    << ". Average: " << average << endl;

}

Answer 1

while ( cin >> ival )
这个意思是，输入任意个的整数，以0作为结束
下面计算平均数和总和。

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