WordPress database error: [Table './ay6u3nor6dat6ba1/kn6_ayu1n9k4_5_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
SELECT a.action_id FROM kn6_ayu1n9k4_5_actionscheduler_actions a WHERE 1=1 AND a.hook='aioseo_send_usage_data' AND a.status IN ('in-progress') ORDER BY a.scheduled_date_gmt ASC LIMIT 0, 1

WordPress database error: [Table './ay6u3nor6dat6ba1/kn6_ayu1n9k4_5_actionscheduler_actions' is marked as crashed and last (automatic?) repair failed]
SELECT a.action_id FROM kn6_ayu1n9k4_5_actionscheduler_actions a WHERE 1=1 AND a.hook='aioseo_send_usage_data' AND a.status IN ('pending') ORDER BY a.scheduled_date_gmt ASC LIMIT 0, 1

ifndef | Loop and Break

Preprocessor Directives in C

ifndef

by ayunoradmin · February 22, 2013

#ifndef is used to check whether a particular symbol is NOT defined.

Example

#ifdef USD              // here preprocessor cheking,  if USD is DEFINED OR NOT
#define currency_rate 50     // if it's defined, currency_rate is equals to 50
#endif                  // end of ifdef, these three lines are finished now


#ifndef USD          // here preprocessor cheking,  if USD is NOT DEFINED
#define currency_rate 1  // Since USD is not defined so this statement executes
#endif                // end these three lines of block 

#include<stdio.h>

int main()
{		
	int rs;
	// currency_rate is defined in preprocessor, which is 1
	rs = 10 * currency_rate;   
	printf ("%d\n", rs);
	getchar();
	return 0;
}

Share

You may also like...