calculating size of array in c++

/************************************************************************* * File : size-of-array.cpp * Author : Saurabh Gupta * Desc : calculating size of array in c++ * Source : http://www.ccplusplus.com/p/c_15.html * Created : 9:43 AM Friday, February 24, 2012 * Note : *************************************************************************/ #include <iostream> using namespace std; int main() { int arr[5]; cout<<"\nBy default array elements are not initilized\n"; for(int i=0; i<5; ++i) { cout<<"arr["<<i<<"]="<<arr[i]<<endl; } cout<<endl; cout<<"Size of this array \"arr\" is: "<<sizeof(arr)<<endl; return(0); } /* * OUTPUT * [sgupta@rhel6x86 cpp]$ c++ size-of-array.cpp -o size-of-array [sgupta@rhel6x86 cpp]$ ./size-of-array By default array elements are not initilized arr[0]=-1074696184 arr[1]=134514761 arr[2]=81089872 arr[3]=134513672 arr[4]=0 Size of this array "arr" is: 20 [sgupta@rhel6x86 cpp]$ */