如何使用printf功能？

Question

I have a quick question about the printf function in c++.

How do I put this for loop onto the screen with the printf function?

for (int count = 0; count < numberOfEmployees; count++) {
    cout << employees[count].name << " \t" << employees[count].title << " \t" <<
                                                gross << "\t" << tax << "\t" << net << "\n";
}

So, I need to take out the cout and put in a call to printf .

It has to look like this, but without the dots:

Weekly Payroll:

Name .. Title ... Gross... Tax... Net

Ebenezer .... Partner.... 250.00...... 62.25 .... 187.75

Bob Cratchit Clerk ...... 15.00 ......... 2.00 ...... 13.00

Answer 1

you can do

printf("%s \t%s \t%d\t%d\t%d\n",
            employees[count].name, 
            employees[count].title, 
            gross, tax, net);

assuming name and title are c style strings, and gross, tax,net are ints, most likely none of them are those types....but gives you the feel for it. the printf documentation gives a guide for printing out the various basic types.

Answer 2

The idea w/ printf is that you have a "format string" with placeholders to be filled in by supplied values. In your case, the format string might look like "%s \\t%s \\t%f\\t%f\\t%f\\n", where each placeholder starts w/ a % followed by a specification of how to interpret the supplied value (for example, s means a string and f means a float). There are a lot more options than that (things like field sizes, # of decimal places, left-or-right alignment), but that's the basic idea.