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DSL

14.Problem statement

Write C++ program to store roll numbers of student in array who attended training program in random order. Write function for-  a) Searching whether particular student attended training program or not using linear search and sentinel search.  b) Searching whether particular student attended training program or not using binary search and Fibonacci search.   

program

#include<iostream>
using namespace std;
class search
{  public:
        int n,i,data[50],son[50],sortdata[50],s;
 void intake()
{     cout<<"Enter No. of Elements=";
  cin>>n;
  cout<<"\nEnter Elements=\n";
  for(i=1;i<=n;i++)
  {   cin>>data[i];
      son[i]=data[i];
  }
}
void search_lini(int item)
{   s=0;
  for(i=1;i<=n;i++)
  {  if(data[i]==item)
     {   s=1;
         break;
     }
  }
  if(s==1)
  cout<<"attended training program:\n";
  else
 cout<<"didn't attended training program:\n";
}
void search_senti(int a)
{  int i=0;
  while(data[i]!=a && i<n)
  { i++; }
  if(i<n)
     cout<<a<<" attended Training Program.\n";
  else
     cout<<a<<" didn't attend Training Program.\n";
}
void search_bin(int x)
{   int y=0;
    int left, right,mid;
    left=0;
    right=n-1;
    while(left<=right)
    {   mid=(left+right)/2;
        if(data[mid]==x)
        {   y=1;
            break;
        }
        else if(data[mid]>x)
            right = mid-1;
        else if(data[mid]<x)
            left=mid+1;
    }
    if(y==1)
        { cout<<x<<" attended Training Program.\n"; }
    else
        { cout<<x<<" didn't attend Training Program.\n"; }
}
int fibsearch(int x)
{   int inf = 0, pos, k;
   static int kk= -1, nn = -1;
    static int fib[]={0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 98,
    1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811,
    514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, 24157817,
    39088169, 63245986, 102334155, 165580141};
    if (nn != n)
    {      k = 0;
        while (fib[k] < n)
            k++;
        kk = k;
        nn = n;
    }
    else
        k = kk;
    while (k > 0)
    {    pos = inf + fib[--k];
        if ((pos >= n) || (x < data[pos]));

        else if (x > data[pos])
        {    inf = pos + 1;
             k--;
        }
        else
           return pos;
    }
    return -1;
}
void sort()
{   int p,j,temp;
for(p=1;p<=n-1;p++)
{   for(j=1;j<=n-1;j++)
    {   if(data[j]>data[j+1])
        {
             temp=data[j];
             data[j]=data[j+1];
             data[j+1]=temp;
        }
    }
    }
}
};
int main()
{ int s,r,pos;
char y='y';
search t;
t.intake();
t.sort();
while(y=='y')
{
    cout<<"\n::Menu::\n"<<"1. Linear Search.\n2. Sentinel Search.\n3. Binary Search.\n4.fibonacci search";
    cin>>s;
    cout<<"Enter Roll no. to search:";
    cin>>r;
switch(s)
{ case 1: cout<<"\tUsing Linear Search :\n";
            t.search_lini(r);
            break;
    case 3: cout<<"\tUsing Binary Search :\n";
            t.search_bin(r);
            break;
    case 2: cout<<"\tUsing Sentinel Search :\n";
            t.search_senti(r);
                break;
    case 4: cout<<"\tUsing fibonacci search:\n";
     pos=t.fibsearch(r);
     if(pos>=0)
  cout<<"attended training program"<<endl;
 else
 cout<<"didn't attended training program"<<endl;
            break;
}
cout<<"do u want to continue(y/n)";
cin>>y;
   }
return 0;
}

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