Programmer Think

1, Basic exception handling Exception handling mechanism: suspend the problem handling, not in the current function, but in other callers (for example, function 1 calls function 2, and function 2 also calls function 3. If an exception is throw n in function n, we can handle it in any of the previous functions.) What is an exception? Anything ...

1 Introduction    to make chess, chess pieces are essential, but after looking for them online for a long time, it's hard to find satisfactory and supporting chess pieces, and some need VIP download. So I adjust the size through QT's label writing function, then draw a circle outside the label using qpaintevent, and finally run the s ...

1. Overview of design mode [concept] some writing methods of code: flexible program and convenient maintenance; But the code is obscure and not easy for others to take over. 2. Single case design mode [concept]: there is one or some special class in the whole project. Only one object belonging to this class can be created. 3. Shared dat ...

A virtual function is a member function declared in a base class and redefined (overridden) by a derived class. When you reference a derived class object using a pointer or a reference to a base class, you can call a virtual function for the object and execute the function version of the derived class. Virtual functions ensure that the correct ...

The sequential array searches for a value The basic idea of binary search is that the search interval must be orderly In this paper, all search is based on the closed interval. At this time, the condition in while should be written as l < = R If you search by the open interval (r=nums.size()), the condition in while should be written ...

Problem Description: Title Description Problem solving ideas: The basic knowledge of tree array will not be repeated here. We only need to know that it can deal with interval maintainability and modifiable RMQ problems, which is more efficient. The following is the operation of segment tree Single point modification void update(int x,in ...

Introduction: when debugging this C + + multi inheritance program with LLDB debugger at work, it is found that the pointer address obtained through LLDB print (alias of expression command) command is different from the address of C + + memory model actually understood. So what is the reason?Author Yang FuSource: Ali technical official accountI. ...

This is for Effective Modern C++ Study notes for Item2. This time, you can learn the automatic derivation of auto type. Except for one scenario, the template type derivation method learned in Item1 can be tried. Review the type derivation of the template: template<typename T> void f(ParamType param); f(expr); // call f with some ex ...

Title Link preface I cooked a chicken and wrote that I went to eat halfway (I can't write the questions after I don't eat...), and I will make up the questions later Attached Official explanation A zhinai's Hello XXXX Problem solution Nothing to say, direct output code print("hello ") B zhinai buys melons Problem solution / idea ...

catalogue Day 1 9:00 - 11:00 am, bottom test T1: bouncing grasshopper Title Description Input format Output format sample input Output sample Example explanation analysis T2: Captain Flint's drifting Title Description Input format Output format Sample sample input Resolution: T3. Tennis match Title Description Input format ...