chartest.c

44B0的实验相关的代码

/*CharTest.c*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
main()
{
		int testdev;
		int i;
		char buf[10];
		testdev = open("/dev/char_dev",O_RDWR);
		if ( testdev == -1 )
		{
		printf("Cann't open file \n");
		exit(0);
		}
		read(testdev,buf,10);
		for (i = 0; i < 10;i++)
		printf("%d\n",buf[i]);
		close(testdev);
}