char switchChar(char ch)
{
	char result;
	char a[]="1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
	char b[]="NOeTdRiosNFzKWkxZYbwnpnjCmrvqVfkgLBhGIDQlIWJMzErxGkSBlyXH[3FAj";
	int i=0;
	while (a[i]!=ch)
	{
		i++;	
	}
	result=b[i];
	retn result;
}

void main()
{
	char str_username[30]={0};
	int str_username_len;
	char str_usercode[30]={0};
	Label1:
	printf "\n用户名不得小于5个字符";
	printf "\n\n\n请输入用户名:";
	scanf "%s",str_username;
	str_username_len = lstrlen(str_username);
	if (str_username_len<5 || str_username_len>=30)
	{
		printf "\n\n\n用户名字数不在指定的范围内";
		sleep(1000);
		system("cls");
		goto Label1;
	}
	system("cls");
	printf "\n用户名不得小于5个字符";
	printf "\n\n\n请输入用户名:%s",str_username;
	printf "\n用户码：";
	scanf "%s",str_usercode;
	char swithed_username[30]={0};
	for (int index=0;index<=str_username_len;index++)
	{
		char ch=*(str_username+index);
		ch = switchChar(ch);
		switched_username[index]=ch;
	}
	int successCount=0;
	for (int index=0;index<=str_username_len;index++)
	{
		if (switched_username[index]==*(str_username+index) successCount++;
	}
	(successCount==str_username_len)?printf"\n密码正确\n":printf"\n密码错误\n";
	sleep(1000);
	system("cls");
}