Length of array in cpp

Array length c++

#include <iostream>
using namespace std;

#define size(type) ((char *)(&type+1)-(char*)(&type))

int main(){
  int arr[5] = {1, 2, 3, 4, 5};
  cout << size(arr) / size(arr[0]) << endl; //returns 5
  //alternatively
  cout << sizeof(arr) / sizeof(int) << endl; //returns 5
}

Find length of array c++

#include <iostream>
using namespace std;
int main() {
   int arr[5] = {4, 1, 8, 2, 9};
   int len = sizeof(arr)/sizeof(arr[0]);
   cout << "The length of the array is: " << len;
   return 0;
}

Array length c++

// array::size
#include <iostream>
#include <array>

int main ()
{
  std::array<int,5> myints;
  std::cout << "size of myints: " << myints.size() << std::endl;
  std::cout << "sizeof(myints): " << sizeof(myints) << std::endl;

  return 0;
}

Source: cplusplus.com

Length of array in cpp

int size = sizeof(arr)/sizeof(arr[0])

Similar codes

22 votes211 views3 answers
Get line C++
C++
0 vote207 views5 answers
Return tuple or null
C++
5 votes217 views1 answer
How to disable buttons in unity
C++
0 vote212 views1 answer
Unreal engine delay c++
C++
0 vote200 views1 answer
3. The method indexOf, part of the List interface, returns the index of the first occurrence of an object in a List. What does the following code fragment do?
C++
1 vote214 views1 answer
In c++ ++ how to write if without if
C++
5 votes231 views6 answers
If arduino
C++
0 vote249 views1 answer
C++ chrono get milliseconds
C++
8 votes217 views3 answers
Initialize all elements of vector to 0 c++
C++
0 vote220 views1 answer
C++ poitner
C++