exit.c

一个用C编写的简单的关系数据库系统

void Exit(DBF * dbf)
{
	char ch = 'N';
	int i = 0;
	DBF * dbfPtr = NULL;
	FILE * fp = NULL;
	
	puts("	确定要退出RDBSM (Y/N)?");
	scanf("%c",&ch);
	if ((ch == 'Y') || (ch == 'y')) {
		for (; i<MAX_OPENED_COUNT; i++)
		{
			dbfPtr = &dbf[i];
			if (dbfPtr->dhName[0] == '\0')
				continue;
			fp = fopen(dbfPtr->dhName,"rb+");
			dbfPtr->dhID = -1;
			fwrite(dbfPtr,sizeof(DBF),1,fp);
			fclose(fp);
		}
		exit(1);
	}
	return;
}