#1  
31st January 2016, 11:54 AM
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How to solve below given C++ program question?


Wite a program in c++ to read an array of stored integers. Search for a value using binary search method. If the element is found, part its location else print element not found.
Please help me with this question.




  #2  
31st January 2016, 08:56 PM
pabolu srivalli
Senior Member
 
Join Date: Jul 2013
Location: hyderabad
Posts: 402
Default Re: How to solve below given C++ program question?

This is the program for storing 5 integers using arrays in C++

#include <iostream>
using namespace std;

int main() {
int n[5];
cout<<"Enter 5 numbers: ";
/* Storing 5 number entered by user in an array using for loop. */
for (int i = 0; i < 5; ++i) {
cin>>n[i];
}

cout<<"First number: "<<n[0]<<endl; // first element of an array is n[0]
cout<<"Last number: "<<n[4]; // last element of an array is n[SIZE_OF_ARRAY - 1]
return 0;
}

Program for Binary Search Algorithm
Binary Search is the process of searching by dividing the set of integers in to two parts and then searching for the algorithm

# 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<<" ****"<<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_elem ent);

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;
}

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;
}
Do you have any question? or have anything to say?



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