C语言 非打印字符

#include

int main(void)
{
	char ch;
	ch = 7;
	int count = 20;
	/*printf("%c",ch);
	printf("\007");		
	printf("\a");
	printf("\7");
	printf("\x7");
	printf("%c",'\7');*/
	printf("Hello\073\n");
	printf("%c\n",10);
	printf("Hello\070\n");
	printf("%c\n",7);
	printf("Hello\071\n");
	printf("%c\n",8);
	printf("Hello\072\n");
	printf("%c\n",9);
}