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

12 votes248 views6 answers
Loop through map c++
C++
0 vote245 views1 answer
How to print an array in cpp in single line
C++
-1 vote268 views1 answer
#include using namespace std; int main() { double leashamt,collaramt,foodamt,totamt; cout<<"Enter the amount spent for a leash : ";
C++
-1 vote250 views1 answer
C++ if else
C++
-1 vote280 views1 answer
Arrays left rotation hackerrank solution
C++
0 vote264 views1 answer
Partition in STL using vector
C++
0 vote246 views1 answer
Platform io change baud rate
C++
0 vote321 views1 answer
Vector size for loop
C++
0 vote263 views1 answer
Output to console in color c++
C++
0 vote247 views1 answer
C++ preprocessor commands
C++