[Java learning notes]
1 import java. util. enumeration; 2 import java. util. vector; 3 4 public class Test4 {5 6 public static void main (String [] args) {7 Vector v = new Vector (); 8 9 v. addElement ("abc1"); 10 v. addElement ("abc2"); 11 v. addElement ("abc3"); 12 v. addElement ("abc4"); 13 14 Enumeration en = v. elements (); // a method unique to a
Chapter 5 is about exceptions. These puzzle occur in these usage exceptions. In this article, we assume that you have some knowledge about Java exception handling mechanisms, of course, you can also get some discussions about the exception mechanism here. Exception is for locatingProgramError and EnhancementCodeJava exception mechanism is also based on C ++. Because of the high usage rate, we often discuss some usage experiences. We agree that excepti
MXN Puzzle
Time Limit: 4000MS
Memory Limit: 131072K
Total Submissions: 4112
Accepted: 1140
DescriptionThe Eight Puzzle, among other sliding-tile puzzles, are one of the famous problems in artificial intelligence. Along with chess, tic-tac-toe and backgammon, it had been used to study search algorithms.The Eight
Puzzle
the issue of inheritance.
For instance methods: When naming the same, subclasses overwrite the methods of the parent class, and the access permission is at least as large as the parent class.
for domain: Naming the same, subclasses hide the domain of the parent class and are free to access.
Puzzle
do not reuse th
Today's whim, want to do a smart jigsaw game to coax girlfriend.
These features need to be implementedFirst image customizationThe second Sudoku customization, of course, I started thinking about 3*3 4*4 5*5, not using 3*5 sudoku.Third, to achieve the function of automatic jigsaw, I believe we know that women play games are not very powerful, so this automatic jigsaw function has.
What other pause, ranking will not write!Now the point is out.To realize the automatic jigsaw
C ++ Primer Study Notes: Add programming assumptions contained in elements to a vector object, cprimer vector
When practicing section 3.14 in C ++ Primer:
# Include
The program reports the following error:
Error: use of undeclared identifier 'vector'
Insert a row:
# Include
To:
# Include
So that no error is reported.
Note thatVectorNamespace required
Summary of the basic usage of STL container vector and stl container vector
According to ACM program design, we use examples to demonstrate vector usage.
Methods: push_back (), insert (), erase (), clear (), size (), empty ();
Algorithm: reverse (), sort (), accumulate ().
1 # include
*************************************** Reprint Please specify the Source:Http://blog.csdn.net/lttree ******************************************When using vectors in the cocos2d-x,There was an error when deleting an object, it crashed ...vectorThere will be errors--vector iterators incompatible;Maybe the way I opened it was wrong, so I used the C++11 method:Vectoror not ... Looking for a long time, found thatIt is said that because, when the iterator
June 8, 2018 today is the second day of learning R feel slow, need to speed up a bit. In addition yesterday seems to write not particularly good, so today intends to study the overall editor.Today to learn the factors, first: what is a factor? Because we know the vectors in R, and because we've been learning python for a while, we have an understanding of dictionaries, arrays, etc. So, for the factor I can be seen as a vector with a little dictionary
Before blogging about some of the uses of Std::find and std::find_ if, but not about the custom classes stored in vectors, how to use Std::find and std::find_if to find them.
First define a class:
Class Item
{
private:
std::string m_itemid;
int m_price;
int m_count;
Public:
Item (std::string ID, int price, int count):
m_itemid (ID), M_count (count), M_price (price) {}
int GetCount () const {return
M_count
}
std::string Getitemid () const {return
the container to be reserved. The resize function can have two parameters, the first parameter is the new container size, and the second parameter is to add new elements in the container. If this parameter is omitted, the default constructor of the element object is called. The following are examples of the two functions:
???? Vector
Because the source code of the two interfaces is quite simplified, You can paste them here:
?? Void? Resize (size_
C++11 provides us with smart pointers, which brings us a lot of convenience.So what if the unique_ptr is the element of a vector container?form the same:vectorBut how do you add elements to VEC?See below:#include#include#include usingnamespacestd;int main(){ vectorint>> vec; vec.push_back(1);//错误 return0;}First define a unique_ptr and then Push_back ():#include#include#include usingnamespacestd;int main(){ vectorint>> vec; unique_ptrint
C++11 provides us with smart pointers, which brings us a lot of convenience.What about the assumption that unique_ptr is the element of a vector container?form the same:vectorBut how do you add elements to VEC?See below:#include#include#include usingnamespacestd;int main(){ vectorint>> vec; vec.push_back(1);//错误 return0;}First define a unique_ptr and then Push_back ():#include#include#include usingnamespacestd;int main(){ vectorint>> vec;
1. DefinitionVector2. Inserting elementsIf you want to define a = [[0,1,2],[3,4,5]], then:Correct insertion method vectorWrong insertion method vector3. LengthThe number of vector elements in vector About the use of vector
Test source#include2. Compiling3. Remove the random base address (for easy search)Instead of 04. Use Ida to open the call function in the main function5. Select address with OD load view6.call very much only look at the key to find the constructor of the vector with the object base address find something with Ida debugging with OD7. Run to the next break data followSure is CC.8. Run constructorsInitialization (STL objects have a feature the first one
Use vector containers, that is, to avoid the search, so today we list some STL find algorithm applied to the vector.
Find ()Returns an iterator to the "the" in the range [First,last] that compares equal to Val. If no such element is found, the function returns last.
#include
find_end () searches the range [first1,last1) for the "Last occurrence of" sequence defined by [ FIRST2,LAST2), and returns a i
This person is the final winner of the night god month in "Death Note" (of course, he used some help from Merlot when defeating the night god month). Niya enjoys playing with various toys, for example, Lego, Domino, etc. Of course, his favorite is still jigsaw puzzle. His reasoning is sometimes like a puzzle. He can always calmly look at various unattainable puzzles and finally crack them. As for the relati
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