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

2 votes272 views1 answer
Excel vba delete worksheet if exists
C++
0 vote271 views1 answer
Visual studio getline not working
C++
0 vote299 views1 answer
Std::is_standard_layout
C++
1 vote275 views1 answer
C++ nested switch statements
C++
0 vote256 views1 answer
Transform c++
C++
2 votes247 views1 answer
Binary search return index c++
C++
-1 vote287 views1 answer
C++ string to vector int
C++
0 vote293 views1 answer
C++ overloading by ref-qualifiers
C++
6 votes289 views1 answer
Convert string to stream c++
C++
3 votes273 views1 answer
Sfml draw line
C++