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

1 vote158 views1 answer
C++ std string to float
C++
0 vote151 views1 answer
Scan line in c++
C++
11 votes172 views2 answers
Enter a key and display it's ascii value in c++
C++
3 votes184 views1 answer
Reference function in c++
C++
0 vote168 views1 answer
Cpp Case value is not a constant expression
C++
0 vote152 views3 answers
If
C++
1 vote170 views3 answers
On component begin overlap c++
C++
0 vote135 views2 answers
See Compilation Time in c++ Program
C++
0 vote159 views5 answers
Return tuple or null
C++
0 vote178 views1 answer
Inverser les éléments d'un tableau manuellement en c++
C++