《完美C++》练习1.3工资问题

#include<iostream>
using namespace std;
int main()
{
    double  pre_income,incre_income,new_income,new_month_income;
    cin>>pre_income;
    const double incre_rate=0.076/6;
    new_month_income=(incre_rate+1)*pre_income/12;
    incre_income=pre_income*incre_rate*12;
    new_income=incre_income+pre_income;
    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);
    cout<<"incre_income: "<<incre_income
    <<endl<<"new_income: "<<new_income
    <<endl<<"new_month_income: "<<new_month_income<<endl;
    system("pause");
}