will be rounded to the nearest penny, preceded immediately by a dollar sign, and followed by the end-of-line
输出少个$符号

> #include <iostream>
> using namespace std;
> 
> int main()
> {
> 	double m_month;
> 	int i=0;
> 	int temp;
> 	double sum=0;
> 	double average;
> 
> 	while (i!=12)
> 	{
> 		cin>>m_month;
> 		sum+=m_month;
> 		i++;
> 	}
> 	average=sum/12+0.005;
> 	
> 	temp=(int)average;//integer
> 	temp=(int)((average-temp)*100);        //decimal
> 	average=(int)average+(float)temp/100;          //average
> 
> 	cout<<average<<endl;
> 	return 0;
> }