userlogin.c

在LINUX下实现的一个超市的收银系统

#include "extern.h"

/*==============用户登录函数=================*/
void UserLogin()
{
    int ch,temp,len,business_no;
    char PASSWORD[20],buf[20];

    bkgd(COLOR_PAIR(1));
	refresh();
	//打印界面
	WINDOW *msg_win =newwin(1,80,0,0);
	wbkgd(msg_win,COLOR_PAIR(5));
	wattron(msg_win,COLOR_PAIR(5));
	mvwprintw(msg_win,0,0,"超市收银系统");
	touchwin(stdscr);
	refresh();
	wrefresh(msg_win);
	wattroff(msg_win,COLOR_PAIR(5));	

	WINDOW *new_win =newwin(10,40,7,20);
	wbkgd(new_win,COLOR_PAIR(2));
	wattron(new_win,COLOR_PAIR(2));
	box(new_win,0,0);
	mvwprintw(new_win,0,12,"欢迎进入登陆窗口");
	mvwprintw(new_win,2,4,"  帐号:");
	mvwprintw(new_win,4,4,"  密码:");
	wattroff(new_win,COLOR_PAIR(2));
		
	WINDOW *ok_win = subwin(new_win,3,10,13,26);
	wbkgd(ok_win,COLOR_PAIR(3));
	box(ok_win,0,0);
	mvwprintw(ok_win,1,1,"  确定  ");
	touchwin(new_win);
	wrefresh(new_win);
	wrefresh(ok_win);
	   
	WINDOW *cancel_win = subwin(new_win,3,10,13,44);
	wbkgd(cancel_win,COLOR_PAIR(3));
	box(cancel_win,0,0);
	mvwprintw(cancel_win,1,1,"  取消  ");
	touchwin(new_win);
	wrefresh(new_win);
	wrefresh(cancel_win);
		
	WINDOW *input_id =subwin(new_win,1,20,9,34);
	wbkgd(input_id,COLOR_PAIR(4));
	touchwin(new_win);
	wrefresh(new_win);
	wrefresh(input_id);
	
	WINDOW *passwd_win = subwin(new_win,1,20,11,34);
	wbkgd(passwd_win,COLOR_PAIR(4));
	touchwin(new_win);
	wrefresh(new_win);
	wrefresh(passwd_win);
	//输入帐号和密码
	do
	{
		wmove(input_id,0,0);
		wclrtoeol(input_id);
		wmove(passwd_win,0,0);
		wclrtoeol(passwd_win);
		wrefresh(input_id);
		wrefresh(passwd_win);
			
		keypad(input_id,TRUE);
		keypad(passwd_win,TRUE);
		
		memset(ACCOUNTID,0,sizeof(ACCOUNTID));
		memset(PASSWORD,0,sizeof(PASSWORD));
		//输入帐号
		echo();
		mvwgetnstr(input_id,0,0,ACCOUNTID,20);
		len = strlen(ACCOUNTID);
		noecho();	

		temp=0;	
		do
		{	
			//输入密码
			ch = mvwgetch(passwd_win,0,0+temp);
		
			if((isprint(ch)) && (!isspace(ch)))//the word can print
			{
				mvwaddch(passwd_win,0,0+temp,'*');
				wrefresh(passwd_win);
				PASSWORD[temp] = ch;
				temp++;
				if(temp >=20)
				{
					break;
				}
			}
			if(ch == '\n')
			{
				break;
			}

			else if(ch == KEY_BACKSPACE)
			{
				if(temp > 0)
				{
					--temp;
					wmove(passwd_win,0,0+temp);
					wclrtoeol(passwd_win);
				}
				else
				{
					wmove(passwd_win,0,0);
					wclrtoeol(passwd_win);
				}
			}

		}while(1);
		keypad(input_id,FALSE);
		keypad(passwd_win,FALSE);

		PASSWORD[temp] = '\0';			
			
		do
		{
			wattron(ok_win,A_REVERSE);	
			mvwprintw(ok_win,1,1,"  确定  ");
			ch = mvwgetch(ok_win,1,8);
			wattroff(ok_win,A_REVERSE);
			wrefresh(ok_win);	
			//当用户输入回车
			if(ch == '\n')
			{	
				//输入的用户名和密码是否正确			
				if(CheckUserLogin(ACCOUNTID,PASSWORD,EMP_NAME,&EMP_GRADE)==1)
				{
					//如果ID的类型为1的话,进入后台管理
					if(1 == EMP_GRADE)
					{						
						clear();
						delwin(msg_win);
						delwin(new_win);
						refresh();
						ShowMessage("         管理员登录,请稍后......");
						BackManager();
					}
					else
					{
						clear();
						delwin(msg_win);
						delwin(new_win);
						refresh();
						ShowMessage("          正在登录,请稍后......");
						
						//查询数据库,获取交易号
						SearchMaxBusinessNo(BUSINESS_NO);
						business_no = atoi(BUSINESS_NO);
						business_no++;
						sprintf(BUSINESS_NO,"%04d",business_no);
						//如果交易号为空
						if(BUSINESS_NO == NULL)
						{
							strncpy(BUSINESS_NO,"0001",strlen("0001"));
						}						
						Cashier();
					}
				}

				//用户不存在
				//判断帐号长度是否为6位
				if(strlen(ACCOUNTID) != 6)
				{
					mvwprintw(ok_win,1,1,"  确定  ");
					touchwin(new_win);
					wrefresh(ok_win);
					mvwprintw(cancel_win,1,1,"  取消  ");
					touchwin(new_win);
					wrefresh(cancel_win);
					ShowMessage("     输入错误,员工号必须为6位数字");
					touchwin(msg_win);
					wrefresh(msg_win);
					touchwin(new_win);
					wrefresh(new_win);
					refresh();
					break;
				}
				// 判断用户输入的密码是否为6到12位
				if(strlen(PASSWORD)<6 || strlen(PASSWORD) > 12)
				{
					mvwprintw(ok_win,1,1,"  确定  ");
					touchwin(new_win);
					wrefresh(ok_win);
					mvwprintw(cancel_win,1,1,"  取消  ");
					touchwin(new_win);
					wrefresh(cancel_win);
					ShowMessage("     输入错误,密码必须为6到12位");
					touchwin(msg_win);
					wrefresh(msg_win);
					touchwin(new_win);
					wrefresh(new_win);
					refresh();
					break;
				}
				else
				{
					mvwprintw(ok_win,1,1,"  确定  ");
					touchwin(new_win);
					wrefresh(ok_win);
					mvwprintw(cancel_win,1,1,"  取消  ");
					touchwin(new_win);
					wrefresh(cancel_win);
					ShowMessage("         用户不存在,请重新输入");
					touchwin(msg_win);
					wrefresh(msg_win);
					touchwin(new_win);
					wrefresh(new_win);
	
					refresh();
					break;
				}
			}
			
			else
			{
				mvwprintw(ok_win,1,1,"  确定  ");
				wrefresh(ok_win);
				wattron(cancel_win,A_REVERSE);
				mvwprintw(cancel_win,1,1,"  取消  ");
				ch = mvwgetch(cancel_win,1,8);
				wattroff(cancel_win,A_REVERSE);
				wrefresh(cancel_win);
				if(ch == '\n')
				{
					mvwprintw(ok_win,1,1,"  确定  ");
					touchwin(new_win);
					wrefresh(ok_win);
					mvwprintw(cancel_win,1,1,"  取消  ");
					touchwin(new_win);
					wrefresh(cancel_win);
					break;	                   
				}
				else 
				{	
					mvwprintw(cancel_win,1,1,"  取消  ");
					wrefresh(cancel_win);
					continue;
				}
			}
				
		}while(1);

	}while(1);
		
	endwin();
    exit(0);
}