Answers for "cpp declare 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
  }

c++ array

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

arr[0] = 4;

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

array syntax in c++

int foo[] = { 10, 20, 30 };
int foo[] { 10, 20, 30 };