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How to find size of array in C/C++ program 

#include<iostream>
using namespace std;

int main()
{
    int a[]={1,2,3,4,5,6,7};
    int size;
    size=sizeof(a)/sizeof(a[0]);
    cout<<"sizeof a"<<size<<"\n";
    system("PAUSE");
    return 0;
}

Output: sizeof a 7

Note: sizeof(a) returns size in bytes and sizeof(a)/sizeof(a[0]) returns number of elements in an array.



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