02-01-2004
scheduling a process
hi there i m having a confusion here with the looping in this example below. can someone help me out!?
#include<stdio.h>
main()
{
char it = 'a';
char stop = 'z';
int x,ret;
for(; it<'f';it++)
{
// for(x=0; x<32000;x++)
write(1,&it,1);
}
x=fork();
if(x);
{
it='F'; stop = 'Z';
}
write(1,&it,1);
write(1,&stop,1);
for(; it<=stop;it++)
{
for(x=0;x<32000;x++);
write(1,&it,1);
}
}
=======================
heres my output
: abcdeFZFGHIJKLMNOPQRSTUVWXYZFZFGHIJKLMNOPQRSTUVWXYZ
for this example i have, the text says it is an example of "sheduling of a process". i can't really sort out why does it say so?
can someone tell me whats the difference between having
for(; it<'f';it++)
{
for(x=0; x<32000;x++)
write(1,&it,1);
}
and
for(; it<'f';it++)
{
for(x=0; x<32000;x++); //i don't get this part!
write(1,&it,1); //how does write work
}
also a similar question
if(x);
{
any code
}
and
if(x)
{
any code
}
Thank you
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LEARN ABOUT FREEBSD
vasprintf_l
PRINTF_L(3) BSD Library Functions Manual PRINTF_L(3)
NAME
printf_l, asprintf_l, fprintf_l, snprintf_l, sprintf_l, vasprintf_l, vfprintf_l, vprintf_l, vsnprintf_l, vsprintf_l -- formatted output con-
version
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdio.h>
#include <xlocale.h>
int
printf_l(locale_t loc, const char * restrict format, ...);
int
asprintf_l(char **ret, locale_t loc, const char * format, ...);
int
fprintf_l(FILE * restrict stream, locale_t loc, const char * restrict format, ...);
int
snprintf_l(char * restrict str, size_t size, locale_t loc, const char * restrict format, ...);
int
sprintf_l(char * restrict str, locale_t loc, const char * restrict format, ...);
int
vasprintf_l(char **ret, locale_t loc, const char *format, va_list ap);
int
vfprintf_l(FILE * restrict stream, locale_t loc, const char * restrict format, va_list ap);
int
vprintf_l(locale_t loc, const char * restrict format, va_list ap);
int
vsnprintf_l(char * restrict str, size_t size, locale_t loc, const char * restrict format, va_list ap);
int
vsprintf_l(char * restrict str, locale_t loc, const char * restrict format, va_list ap);
DESCRIPTION
The above functions are used to convert formatted output in the locale loc. They behave in the same way as the versions without the _l suf-
fix, but use the specified locale rather than the global or per-thread locale. See the specific manual pages for more information.
SEE ALSO
printf(3), xlocale(3)
STANDARDS
These functions do not conform to any specific standard so they should be considered as non-portable local extensions.
HISTORY
These functions first appeared in Darwin and were first implemented in FreeBSD 9.1.
BSD
April 7, 2012 BSD