What are C ++ dynamic arrays?

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, . . C++ new delete. new (free store heap .). , delete .

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new . - , (, ) . new : double, char, int . . .

	int *p = new int; // * - ,    .   .
	*p = 9;
	delete p;

      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

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	double *a = new double[10]; // a -   ,     10   double
	a[5] = 2.5;
	delete [] a; //    !  !

      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

delete , , .

- . …

	double **ma = new double *[5]; // 1
	for(int I = 0; I < 5; i++) // 2
		ma[i] = new double[10];

      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

, C++ 5 10. 5 . , , 10 , .

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	for(int I = 0; i < 5l i++)
		delete [] ma[i];
	//,  - …
	delete [] ma; 

      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

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STL vector –

<vector>.

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#include <vector>
#include <iostream>
int main() {
	std::vector<int> v; //       int
				//  –   std,  std::
	for(int i = 0; i <= 5; ++i) {
		v.push_back(i);
	}
	for(int i = 0; i < v.size(); ++i) {
		std::cout << v[i] << ", ";
	}
	std::cout << std::endl;
	system("pause");
}

      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

, , . , ++ .size() .push_back(). , - .

– , . .

, .at(), out_of_range, try-catch. [] .front() .back() .

++ - 5 5.

    vector< vector<int> > v(5, vector<int>(5));
    v[2][3] = 10;
    int a = v[2][3];
    v[2].push_back(5); //     
    v[2].pop_back(); //  
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

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