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

0 vote328 views1 answer
Pass map as reference c++
C++
0 vote316 views1 answer
Unreal engine c++ bind action to function with parameter
C++
4 votes311 views2 answers
Sqrt cpp
C++
36 votes407 views3 answers
How to type hello world in c++
C++
1 vote307 views1 answer
Merge images opencv c++
C++
0 vote315 views1 answer
Random key generator c++ all unique characters
C++
7 votes330 views6 answers
C++ sleep function
C++
0 vote294 views1 answer
Write C++ program that will ask to choose from three cases.
C++
15 votes313 views10 answers
Hello world
C++
0 vote342 views1 answer
C++ string erase all occurrences
C++