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# Program to implement the Binary search Algorithm

Posted By: Easy Tutor     Category: C++ Programming     Views: 21839

## Code for Program to implement the Binary search Algorithm in C++ Programming

``` # include <iostream.h>
# include    <conio.h>

int binary_search(int [],int,int);

main( )
{
clrscr( );

constint array_size=10;
int array[array_size]={0,6,9,12,20,23,29,32,47,79};

cout<<" ******************************************************************************"<<endl;
cout<<" *******************************  Binary Search  ******************************"<<endl;
cout<<" ******************************************************************************"<<endl;

gotoxy(1,24);
cout<<" ******************************************************************************"<<endl;
cout<<" ******************************************************************************";

gotoxy(1,5);
cout<<"\n The contents of the array are : "<<endl;

cout<<"\n     Elements :"<<"\t\t     Value:"<<endl;

for(int count=0;count<array_size;count++)
{
cout<<"\t"<<" array ["<<count<<"]"<<"\t\t";
cout<<array[count]<<endl;
}

int searching_element=0;
int flag=0;

cout<<"\n Enter the element you want to find  =  ";
cin>>searching_element;

flag=binary_search(array,array_size,searching_element);

if(flag!=-1)
cout<<"\n The given element is found at the position  array["<<flag<<"].";

else
cout<<"\n The given element is not found.";

getch( );
return 0;
}

/*************************************************************************///--------------------------  binary_search( )  -------------------------///*************************************************************************/int binary_search(int array[],int array_size,int element)
{
int start=0;
int end=array_size-1;
int middle;
int position=-1;

middle=(start+end)/2;

do
{
if(element<array[middle])
end=middle-1;

elseif(element>array[middle])
start=middle+1;

middle=(start+end)/2;
}
while(start<=end && array[middle]!=element);

if(array[middle]==element)
position=middle;

return position;
}
```
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