Q47663: Variable Width, Precision Available with printf

Article: Q47663
Product(s): See article
Version(s): 5.00 5.10 | 5.00 5.10
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | S_QuickC 1.00 1.10 2.00 2.01 S_QuickASM | mspl13_c
Last Modified: 9-AUG-1989

The Microsoft run-time library function printf() allows the width of
the format specifier to be supplied at run time. This is done with the
use of the * with the format specifier. This is mentioned on Pages 460
and 461 of the "Microsoft C 5.1 Optimizing Compiler Run-Time Library
Reference." The following code sample demonstrates this capability.

Code Sample
-----------

/* This program defines a procedure to print out a floating point
   number with variable width and precision.
*/
#include <stdio.h>

void print(int, int, float);

void main(void) {
   print (10, 2, 1234.5678f);
   print (9, 4, 1234.5678f);
   print (5, 2, 1234.5678f);
}

void print(int w, int p, float value)  {
   printf ("Printf format :%*.*f\n", w, p, value);
   printf ("Width =        0123456789012\n");
}

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