modify2.c

Unix操作系统实验

#include <sys/types.h>
#include <unistd.h>

main()
{
	int pid,i;
	pid=fork();
	for(;;)
	{
	if(pid<0)		/*Fork fail*/
		printf("fork error\n");
	else if(pid==0)		/*When pid==0, it is in child process*/
	{
		nice(1);
		printf("c\n");
	}	
	else			/*In parent process*/
	{	
		printf("p\n");
	}
	}
}