从printf scanf转换为cin cout的问题

Question

For my homework assignment I have been been asked to take my previous project and change it from using <stdio.h> to <iostream> In the process I've had quite a few errors, and am just a little stuck on a few particular ones.

As far as my preprocessor directives go, I have included:

#include <iostream>
#include <iomanip>
#include <fstream>

the error codes I have gotten specify specific lines of my code. One of the recurring errors I get is:

error: expected primary-expression before âfloatâ

This error came from these lines:

void PrintAverages(ofstream &output, int tot_employees, float tot_payrate, float tot_reghrs,
                   float tot_ovthrs, float tot_gross, float tot_fed, float tot_state,
                   float tot_ssi, float tot_def, float tot_net)
{      

    output << reportfile, "\n\nAverages:" << tot_payrate / tot_employees <<
              tot_reghrs / tot_employees << tot_gross / tot_employees <<
              tot_fed / tot_employees << tot_ssi / tot_employees << tot_net / tot_employees <<
              tot_ovthrs / tot_employees << tot_state / tot_employees << tot_def / tot_employees;
}

This is one of my external functions. The error code occurs several times with my other functions. I figure that the issue is similar to what ever is causing this one. If anyone could help point me in the right direction that would be great!

-Devin

Answer 1

What type is reportfile ? The comma between reportfile and the \\n\\nAverages: string looks odd - shouldn't that be a << also?

You'll want spaces between your floats, otherwise it will all run together. Use << " " << between each float instead of just << .

Answer 2

Try

std::ofstream

as ofstream is declared in namespace std.

Also the comma after reportfile should be a << .