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 vote296 views10 answers
Convert c program to c++ online
C++
4 votes342 views3 answers
Convert int to binary string c++
C++
10 votes317 views2 answers
Double to string c++
C++
5 votes301 views1 answer
How to use comparator funtion in priority queue in c++
C++
0 vote302 views1 answer
Servicenow cart api
C++
0 vote315 views1 answer
Find maximum contiguous Sub arrays
C++
2 votes283 views1 answer
Java print f int
C++
1 vote362 views2 answers
Convert from hex to decimal c++
C++
25 votes314 views10 answers
Netflix
C++
1 vote337 views1 answer
C++ until
C++