Answer Posted / majid - iran

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

using namespace std;

int **m;
long q=0;
long num=0;
long number=0;

long fact( long n )
{
return ( n > 0 ? n*fact(n-1) : 1 );
}

long C( long n , long r )
{
return ( fact(n)/(fact(r)*fact(n-r)) );
}

bool isPrinted(int *a, long n)
{
bool is=true;
for(long i=0;i<num;i++)
{
is=true;
for(long j=0;j<n;j++)
{
if(a[j]!=m[i][j])
{
is=false;
}
}
if(is)return true;
}
return false;
}

void print(int *a,long n)
{
int swap=0;
for(long i=0;i<n;i++)
{
for(long j=i;j<n;j++)
{
if(a[j]<a[i])
{
swap=a[i];
a[i]=a[j];
a[j]=swap;
}
}
}
if(!isPrinted(a,n))
{
number++;
cout<<number<<".{";
for(long i=0;i<n;i++)
{
cout<<a[i];
m[q][i]=a[i];
if(i!=n-1)
{
cout<<",";
}
}
q++;
cout<<"}"<<endl;
}
}

void printAll(int *a,int *b,long n,long k)
{
if(q<num)
{
if(k==1)
{
print(a,n);
}
if(k==0)
{
print(a,n);
}
else if(k>0)
{
int *c, *d;
long p=0;
for(long j=0;j<k;j++)
{
p=0;
c=new int[k-1];
for(long t=0;t<k;t++)
{
if(t!=j)
{
c[p]=b[t];
p++;
}
}
d=new int[n];
for(long i=-1;i<n;i++)
{
for(long t=0;t<n;t++)
{
d[t]=a[t];
}
if(i!=-1)
{
d[i]=b[j];
}
printAll(d,c,n,k-1);
}
}
delete c , d;
}
}
}

int main()
{
time_t start , end;
long n = 0 , k = 0;
cout<<"Enter n:";
cin>>n;
cout<<"Enter k:";
cin>>k;
int *a=new int[n];
for(long i=0;i<n;i++)
{
cin>>a[i];
}
int *b=new int[k];
int *c=new int[n-k];
for(long i=0;i<n;i++)
{
if(i<k)
{
b[i]=a[i];
}
else
{
c[n-i-1]=a[i];
}
}
system("cls");
cout<<"S={";
for( long i = 0 ; i < n ; i++ )
{
cout<<a[i];
if( i != n-1 )
cout<<",";
}
cout<<"}"<<endl;
num=C(n,k);
m=new int*[C(n,k)];
for(long i=0;i<C(n,k);i++)
{
m[i]=new int[k];
}
start=clock();
printAll(b,c,k,n-k);
delete a , b , c;
end=clock();
cout<<"All of subsets printed in "<<float(end-
start)/float(CLK_TCK)<<" seconds."<<endl;
getch();
return 0;
}

Performance Algorithm A performs 10n2 basic operations and algorithm B performs 300 lg n basic operations. For what value of n does algorithm B start to show its better performance?

7778

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Question 1: Implement a base class Appointment and derived classes Onetime, Daily, Weekly, and Monthly. An appointment has a description (for example, “see the dentist”) and a date and time. Write a virtual function occurs_on(int year, int month, int day) that checks whether the appointment occurs on that date. For example, for a monthly appointment, you must check whether the day of the month matches. Then fill a vector of Appointment* with a mixture of appointments. Have the user enter a date and print out all appointments that happen on that date. *This Should Be Done IN C++

1096

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Given a table of the form: Product Sold on A 1/1/1980 B 1/1/1980 C 1/1/1980 A 1/1/1980 B 1/1/1980 C 2/1/1980 A 2/1/1980 There are 30 products and 10,000 records of such type. Also the month period during which sales happened is given to u. Write the program to display the result as: Product Month No. of copies A January 12 A February 15 A March 27 B January 54 B February 15 B March 10 C January 37

2636

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write a program to convert temperature from fa height into celcius and vise versa,use modular programming

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can you please write a program for deadlock that can detect deadlock and to prevent deadlock.

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3704

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4870

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