Predict the output of following C++ program. 1 #include<iostream> 2 using namespace std; 3 4 class Test 5 { 6 protected: 7 int x; 8 public: 9 Test (int i):x(i) 10 { 11 } 12 13 void fun() const 14 { 15 cout << "fun() const called " &l…

Declare a function To declare a function without identifying the argument list, you can do it in this way: void say hello(...); here, you use three point (...) to indicate that the function have no argument. function overloading Keep in mind that the…

In C++ and Java, functions can not be overloaded if they differ only in the return type. For example, the following program C++ and Java programs fail in compilation. (1)C++ Program 1 #include<iostream> 2 int foo() 3 { 4 return 10; 5 } 6 7 char foo(…

In C++, following function declarations cannot be overloaded. (1)Function declarations that differ only in the return type. For example, the following program fails in compilation. 1 #include<iostream> 2 int foo() 3 { 4 return 10; 5 } 6 7 char foo()…

Values assigned with let and const are seen everywhere in JavaScript. It's become common to hear them explained like so: "const creates an constant (immutable) binding while bindings created with let can be changed (mutated) without issue." Alth…

c++的操蛋属性:自己为一档,空一档,其他随意. UB_stack a; UB_stack b = a; // copy auto c = a; auto d {a}; // (or auto d = {a}), deduced type is std::initializer_list 这是一个抓狂的问题,详见:http://scottmeyers.blogspot.com.au/2014/03/if-braced-initializers-have-no-type-why.html 今日一乐…

尽管函数名和参数列表都相同,void foo( ) const成员函数是可以与void foo( )并存的,可以形成重载! 我们假设调用语句为obj.foo(),如果obj为non-const对象,则调用foo().如果obj为const对象,则调用foo()const.另外要注意,假如没有提供foo()const,则const obj调用foo()将会报错.但假如是没有提供foo(),则non-const obj调用foo()const是完全没有问题的.也就是说,non-const对象可以调用…

原文:http://www.noxeos.com/2011/07/29/c-const-static-keywords/ C: const and static keywords Ok, once and for all, I’ll try to clarify to meaning of the ‘const’ and ‘static’ keywords in C (it applies to Objective-C and C++ too). I’m just tired of questi…

const, static and readonly http://tutorials.csharp-online.net/const,_static_and_readonly Within a class, const, static and readonly members are special in comparison to the other modifiers. [edit] const vs. readonly const and readonly perform a simil…

'const' keyword is for creating a read only variable, something you can never change once created. 'const' likes 'let' keyword alos has block scope. describe("using const", function(){ it("will make a variable read-only", function(){ c…