Can we use variable length in printf program

[Man4ish]

Hi,
I am working on data formatting. I need to format the data based on input var length by keeping some space. for example.....


void Formater(string str)
{
int len = str.size();
int i = 20;
printf ("%lend", i );
}


in main function call is Formater("Hello");
output should be
' 20' three space before 20.
Here len is variable. but it does not work as expected.How can i implement it. Thanks in advance

[Banfa]

Since you are using string you must be using C++.

Since you are using C++ you should be using cout not printf.

If you were using cout you could use the setw io manipulator to set the width.


As an aside there is a method to pass printf a varible whose contents is used as field width. A quick google should turn it up for you.