C / C++ / MFC

#include <iostream>
using namespace std;

int main()
{
int count, j, elements[50], search_num, first, last, mid;
cout<<"Enter the total number of elements :";
cin>>count;

cout<<"\nEnter ">>count>>" numbers:\n";
for (j=0; j<count; j++)
{
cin>>elements[j];
}

cout<<"\nWhich number that you want to search: ";
cin>>search_num;
first = 0;

last = count-1;
mid = (first+last)/2;

// binary search
while (first <= last)
{
if(elements[mid] > search_num){
first = mid + 1;
}

else if(elements[mid] == search_num){
cout<<search_num<<" found in array at "<<mid+1<<"\n";
break;
}
else {
last = mid - 1;
}

mid = (first + last)/2;
}

if(first > last){
cout<<search_num<<" Not found in an array";
}
return 0;
}

ShellExecute(NULL, _T("open"), sPath + _T("\\") + sText, NULL, NULL, SW_SHOWNORMAL);