#include <stdio.h>
#include <stdlib.h>
#include <time.h>

main()
{
	srand((unsigned) time(NULL));
	
	int num, c;
	
	num = rand() % 21 - 10;
	
	if(num >= 0)
		c = 1;
	else
		c = -1;
		
	printf("Absolute value of %d is %d.\n", num, num * c);
	
	return(0);

}