C++ array

Number of elements in c++ array

#include <iostream>
using std::cout;

int a[] = { 1, 2, 3, 4, 5 };
int counta()
  {
  return sizeof( a ) / sizeof( a[ 0 ] );  // works, since a[] is an array
  }

int countb( int b[] )
  {
  return sizeof( b ) / sizeof( b[ 0 ] );  // fails, since b[] is a pointer
  }

Creare array con c++

#include <iostream>
int main()
{
int myArray[] {2, 4, 6, 8, 10};
for (int i=0; i<5; i++)
{
std::cout << "index: " << i << " - value: " << myArray[i] << "\n";
}
return 0;
}

Source: html.it

C++ array

const int len = 3;
int arr[len];

arr[0] = 4;

int abc[4]{0,12,3}

Array in c++

int jimmy [3][5];

Source: cplusplus.com

Array in c++

char century [100][365][24][60][60];

-1

Source: cplusplus.com

Std::array c++

// An example of using std::array
// Basic syntax: std::array<TYPE, SIZE> NAME;
// Note that the size must be a constant

#include <iostream>
#include <array> // Use std::array

int main() {
	std::array<int, 10> arr;
  	arr[0] = 5; // Setting an element
  	std::cout << arr[0] << std::endl; // Element access
  	std::cout << arr.at(0) << std::endl; // Element access with bounds checking
}

-3

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