Specify * : printf star « printf scanf « C Tutorial

1. C Tutorial
2. printf scanf
3. printf star

#include <stdio.h>
main()
{
    printf ("%*d\n", 5, 20);     // A
    printf ("%*d\n", 20, 5);     // B
}

20
                        5

In A, 5 is substituted for * and it indicates putting the value 20 in 5 columns.

In B, 20 is substituted for * and it indicates putting the value 5 in 20 columns.