Created
October 14, 2012 03:35
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开发一个登陆系统,如果输入用户名密码错误3次,提示冻结账号
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import java.util.*; | |
public class Login { | |
public static void main(String[] args) { | |
Scanner input = new Scanner(System.in); | |
int errorNum = 0;//赋初始变量 | |
String lastname = "";//赋初始变量 | |
while (true){ | |
System.out.println("请输入用户名:"); | |
String name = input.next(); | |
System.out.println("请输入密码:"); | |
String password = input.next(); | |
if ("tom".equals(name)&&"123".equals(password)){ | |
System.out.println("登陆成功!"); | |
break; | |
}else { | |
if (name.equals(lastname)||"".equals(lastname)){ | |
errorNum++;//如果最后一次错误输入账号和当前输入账号一致,错误次数errorNum自加一次 | |
}else { | |
errorNum = 1;//否则把errorNum归为1 | |
} | |
lastname = name;//把当前输入账号赋值给lastname | |
if (errorNum == 3){ | |
System.out.println(lastname + "账号已被冻结!"); | |
break; | |
} | |
} | |
} | |
} | |
} |
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