06-07-2014
I agree with corona688, rbatte1 and bakunin, coding is very simple basics things you need to improve / understand are :
1. Logical / control flow
2. Basic mathematics
3. Basic logic gates and their functions
4. Your own logic to implement task in simple way
5. Ability to learn and work hard
6. Develop Analytical Skills
Don't worry about syntax, if you can develop / improve above things, you can easily start coding with the help of some manual / online resources / Forums
I personally recommend people to take advantage of forums to improve their skills, problem solving ability, don't just search short time quick fix to problem, always try to analyze solution.
These 2 Users Gave Thanks to Akshay Hegde For This Post:
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LEARN ABOUT ULTRIX
getpriority
getpriority(2) System Calls Manual getpriority(2)
Name
getpriority, setpriority - get or set program scheduling priority
Syntax
#include <sys/time.h>
#include <sys/resource.h>
#define PRIO_PROCESS 0 /* process */
#define PRIO_PGRP 1 /* process group */
#define PRIO_USER 2 /* user id */
prio = getpriority(which, who)
int prio, which, who;
setpriority(which, who, prio)
int which, who, prio;
Description
The scheduling priority of the process, process group, or user, as indicated by which and who, is obtained with the call and set with the
call. The which is one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER, and who is interpreted relative to which (a process identifier for
PRIO_PROCESS, process group identifier for PRIO_PGRP, and a user ID for PRIO_USER). The prio is a value in the range -20 to 20. The
default priority is 0; lower priorities cause more favorable scheduling.
The call returns the highest priority (lowest numerical value) enjoyed by any of the specified processes. The call sets the priorities of
all of the specified processes to the specified value. Only the superuser may lower priorities.
Return Values
Since can legitimately return the value -1, it is necessary to clear the external variable errno prior to the call, then check it afterward
to determine if a -1 is an error or a legitimate value. The call returns 0 if there is no error or -1 if there is.
Diagnostics
The and system calls fail under the following conditions:
[ESRCH] No processes were located using the which and who values specified.
[EINVAL] The which was not one of PRIO_PROCESS, PRIO_PGRP, or PRIO_USER.
In addition to the errors indicated above, setpriority can fail under the following conditions:
[EPERM] A process was located, but neither its effective nor real user ID matched the effective user ID of the caller.
[EACCES] A user other than the superuser attempted to change a process priority to a negative value.
See Also
nice(1), fork(2), renice(8)
getpriority(2)