fork download
copy 
  1. //Maxwell Brewer                 CS1A                     Chapter 9, p. 537,  #1
  2. //
  3. /*******************************************************************************
  4.  * ARRAY ALLOCATOR
  5.  * _____________________________________________________________________________
  6.  * This program will 
  7.  * _____________________________________________________________________________
  8.  * INPUT
  9.  *   
  10.  * 
  11.  * OUTPUT
  12.  *   
  13.  *
  14.  ******************************************************************************/
  15.  
  16. #include <iostream>
  17. using namespace std;
  18.  
  19. int *arrayAllocator(int numElements){
  20.     //first check if argument is 0 or negative
  21.     if(numElements <= 0){
  22.         //in this case return a null pointer
  23.         return nullptr;
  24.     }
  25.  
  26.     //otherwise, dynamically allocate memory
  27.     //for an array of specified size
  28.     int *ptr = new int[numElements];
  29.  
  30.     //return the created pointer
  31.     return ptr;
  32.  }
  33.  
  34.  int main() {
  35.     int numElements = 70;
  36.     int* myArray = arrayAllocator(numElements);
  37.  
  38.     if (myArray != nullptr) {
  39.         // Use the array (example)
  40.         for (int i = 0; i < numElements; i++) {
  41.             myArray[i] = i * 2;
  42.         }
  43.  
  44.         // Print the array
  45.         for (int i = 0; i < numElements; i++) {
  46.             std::cout << myArray[i] << " ";
  47.         }
  48.         std::cout << std::endl;
  49.  
  50.         // Deallocate memory
  51.         delete[] myArray;
  52.     } else {
  53.         cerr << "Array allocation failed or invalid size." << endl;
  54.     }
  55.  
  56.     return 0;
  57. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin
copy 


			

					
			
			

				
	
		
		
	
		
		 stdout
					

				
				 copy
			

			
	

		
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 


	

		
	 
	
	
			

					
			
			
			
			
			
			
			
			

			
			
			
		

	
		
		

			

			                        







			
			

				

	
					
					 https://ideone.com/KrZDOB
					
					
					
					
					

												
Chapter 9, p. 537,  #1

												
						
						

					

					
					
					

						
language:

						
C++ (gcc 8.3)

					

					

						
created:
								
						
2 days ago

					

					

						
visibility:

						

							 public																												
							
							

								
							

						

					

										
										

					
					 Share or Embed source code
					
					
					
					

						
						
						
						
						
						
						
					

					
						
	
	
	
	
					
					
					
					
					 
					
					
					
					 
					
					
					
					
					
					

					

					

					
						
					

					


	
Discover > Sphere Engine API

	
The brand new service which powers Ideone!

	
	
Discover > IDE Widget

    
Widget for compiling and running the source code in a web browser!