1.checked和unchecked 运算符 C#提供了checked 和uncheckde 运算符.如果把一个代码块标记为checked, CLR就会执行溢出检查,如果发生溢出,就抛出overflowException异常. ; checked { b++; } Console.WriteLine(b.ToString()); 用/checked 编译器选项进行编译,就可以检查程序中所有未标记代码中的溢出. 如果要禁止溢出检查,则可以把代码标记为unchecked:unchecked是默认行…

1.运算符重载:运算符重重载的关键是在对象上不能总是只调用方法或属性,有时还需要做一些其他工作,例如,对数值进行相加.相乘或逻辑操作等.例如,语句if(a==b).对于类,这个语句在默认状态下会比较引用 a 和 b .检测这两个引用是否指向内存中的同一个地址,而不是检测两个实例是否包含相同的数据.然而对于 string 类,这种操作就会重写,于是比较字符串实际上就是比较每个字符串的内容.可以对自己的类进行这样的操作. 对于结构,"==" 运算符在默认状态下是不做任何工作.试图比较两个结…

1.MVC的定义:   Models: Classes that represent the data of the application  and that use validation logic to enforce business rules for that data. Views: Template files that your application uses to dynamically  generate HTML responses. Controllers: Clas…

2016年10月31日 星期一 --出埃及记 Exodus 19:16 On the morning of the third day there was thunder and lightning, with a thick cloud over the mountain, and a very loud trumpet blast. Everyone in the camp trembled. 到了第三天早晨,在山上有雷轰,闪电,和密云,并且角声甚大,营中的百姓尽都发颤.…

2016年10月30日 星期日 --出埃及记 Exodus 19:15 Then he said to the people, "Prepare yourselves for the third day. Abstain from sexual relations."他对百姓说,到第三天要预备好了.不可亲近女人.…

2016年10月29日 星期六 --出埃及记 Exodus 19:14 After Moses had gone down the mountain to the people, he consecrated them, and they washed their clothes.摩西下山往百姓那里去,叫他们自洁,他们就洗衣服.…

2016年10月28日 星期五 --出埃及记 Exodus 19:13 He shall surely be stoned or shot with arrows; not a hand is to be laid on him. Whether man or animal, he shall not be permitted to live.' Only when the ram's horn sounds a long blast may they go up to the mountain…

2016年10月27日 星期四 --出埃及记 Exodus 19:12 Put limits for the people around the mountain and tell them, `Be careful that you do not go up the mountain or touch the foot of it. Whoever touches the mountain shall surely be put to death. 你要在山的四围给百姓定界限,说,你们当谨慎,…

2016年10月26日 星期三 --出埃及记 Exodus 19:10-11 And the LORD said to Moses, "Go to the people and consecrate them today and tomorrow. Have them wash their clothes and be ready by the third day, because on that day the LORD will come down on Mount Sinai in the…

2016年10月25日 星期二 --出埃及记 Exodus 19:9 The LORD said to Moses, "I am going to come to you in a dense cloud, so that the people will hear me speaking with you and will always put their trust in you." Then Moses told the LORD what the people had said.…