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  1. #include <stdio.h>
  2. #include <stdarg.h>
  3.  
  4. void
  5. sajatprintf (char *formatumsztring, ...)
  6. {
  7.   va_list arg_pointer;
  8.   char *p = formatumsztring, c;
  9.  
  10.   va_start (arg_pointer, formatumsztring);
  11.   for (c = *p; *p; ++p)
  12.     {
  13.       if (*p == '%')
  14. 	{
  15. 	  c = *++p;
  16. 	  if (c == 'd')
  17. 	    printf ("%d", va_arg (arg_pointer, int));
  18. 	  else if (c == 'f')
  19. 	    printf ("%f", va_arg (arg_pointer, double));
  20. 	  else if (c == 'c')
  21. 	    printf ("%c", va_arg (arg_pointer, int));
  22. 	  else if (c == 'u')
  23. 	    printf ("%u", va_arg (arg_pointer, unsigned int));
  24.  
  25. 	  else if (c == 'L')
  26. 	    printf ("%Lf", va_arg (arg_pointer, long double));
  27. else if (c == 'x')
  28. 	    printf ("%x", va_arg (arg_pointer, unsigned int));
  29. 	}
  30.       else
  31. 	printf ("%c", *p);
  32.     }
  33.   va_end (arg_pointer);
  34. }
  35.  
  36. int
  37. main (void)
  38. {
  39.   int a = 5;
  40.   double b = 5.5;
  41.   char c = '*';
  42.   unsigned int d = 45695;
  43.   long double e = 1.79769e+2;
  44.   int f = 0xFF;
  45.      sajatprintf
  46.     (" int: %d\n char: %c\n float: %f\n int:  %d\n unsigned int: %u\n long double: %Lf\n hex%% int: %d\n %%hex: %x\n",
  47.      a, c, b, a, d, e, f, f);
  48.   return 0;
  49. }
Success #stdin #stdout 0.01s 1720KB
comments (?)
stdin
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Standard input is empty
stdout
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 int: 5
 char: *
 float: 5.500000
 int:  5
 unsigned int: 45695
 long double: 179.769000f
 hex int: 255
 hex: ff
https://ideone.com/k3VCS
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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