三步逻辑:
打开冰箱门
把大象放进冰箱
关闭冰箱门
银行系统
class Users
{
int id;
string name;
public static double Balance;
public Users()
{
id = 101;
name = "zhangsan";
}
public void Deposit(double a)
{
Balance = Balance + a;
Console.WriteLine("存款成功!余额:{0}",Balance);
}
public void withDrawal(double a)
{
if (Balance<a)
{
Console.WriteLine("余额不足,取款失败");
}
else
{
Balance = Balance - a;
Console.WriteLine("取款成功!余额:{0}", Balance);
}
}
public void inquire()
{
if (id==0)
{
Console.WriteLine("无此账号!!");
}
else
{
Console.WriteLine("当前余额:{0}", Balance);
}
}
public void cAC()
{
id = 0;
name = null;
Balance = 0;
Console.WriteLine("销户成功!!!");
}
}
把一个问题分成多个小问题(大事化小小事化了)