CPP

invoking method of a base class in a derived class Typically, if your specialized implementations in derived class need to reuse the base class's generic implementation, you can…

C++ syntax of derivation 1234class base{ //...base class members} 1234class Derived: access-specifier Base{ //...derived class members} the base class is also called the super…

using aggregate initialization on classes and structs aggregate initialization syntax 1Type objectName = {argument1,...,argumentN} alternatively 1Type objecname…

sizeof() a char* pointer's size is fixed at 4 bytes (on 32-bit system, and double it on 64-bit) and is independent of the volume of data being pointed to. declaring a friend of…

move constructor 123456789class MyString{ // pick implementation from Listing 9.9};MyString Copy(MyString& source) // function{ MyString copyForReturn(source.GetString())…

the difference of & used in reference and store address A reference & is a alias of variable and must be initialized before we use it, eg: 1234int a=6;//initialization…

strlen vs sizeof strlen method is used to find the length of an array whereas sizeof method is used to find the actual size of data, eg: 1234567891011strcpy(str,"this is a…

return用来退出当前函数模块。 注意有返回值，即：return (num) 中(num)是某个返回值，则调用函数的时候可以赋值，比如如果返回是int类型可以这样赋值urnum=MyFunction(factor);,如果没有返回值则直接调用该函数的时候直接函数直接写在一行，即，执行该子函数的程序结果，但是没有返回值（不能赋值）…

12warning: backslash and newline separated by space int colAndrowArray[3][3]= \ 此类换行错误，删除反斜杠\后面的空格，就不会有waring了。 两种换行方式 添加\或者 双引号"" 12345cout << "Hello \World"…

使用变量和常量 std::cin不要用endl e.g. 下面写法是错误的 1cin >> typeNUmbe >>endl; 以上写法会报错！！！ 在C++中，变量名可包含数字和字母，但不能以数字打头。变量名不能包含空格和算术运算符（+、－等）。另外，变量名不能是系统函数的关键字。例如，将变量命名为return…