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

3 votes298 views2 answers
Iomanip
C++
0 vote275 views1 answer
C++ default constructor remove
C++
0 vote272 views1 answer
C++ rgb code
C++
3 votes325 views2 answers
Opencv(4.1.2) /io/opencv/modules/imgproc/src/resize.cpp:3720: error: (-215:assertion failed) !ssize.empty() in function 'resize'
C++
0 vote330 views1 answer
C++ functions dynamic vector
C++
0 vote309 views1 answer
Query for rmq using sqrt decomposition
C++
0 vote282 views1 answer
C++ clear char array
C++
10 votes300 views2 answers
Difference between programming and coding
C++
0 vote277 views1 answer
Ordine crescente di numeri indefiniti in c++
C++
1 vote282 views1 answer
C++ std::fmin
C++