Binary Search - Can't submit

#1

Here is the code. I can’t submit it, probably some runtime error.

#include
using namespace std;

int b_search(int a[], int n, int key)
{
int beg = 0;
int last = n-1;

int mid = (beg+last)/2;

while(beg != last)
{
    if(a[mid] == key)
    {
        return mid;
    }
    else if(a[mid] > key)
    {
        last = mid;
    }
    else if(a[mid] < key)
    {
        beg = mid;
    }
}

return -1;

}

int main()
{
int n;
cin>>n;

int a[n];

for(int i=0; i<n; i++)
{
    cin>>a[i];
}

int key;
cin>>key;

int ans = b_search(a,n,key);

cout<<ans;

}

#2

@abhishekchoudhary


Check it now. I have corrected some mistakes.

#3

Got it.
It works now.
Thanks.

#4

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