#include <iostream.h>
#include <stdio.h>
 int main()
  {
 int n;
 cout<<"enter a decimal number to convert to binary: ";
  while (cin >> n)
 {
   if (n > 0)
  {
    cout <<"binary equivalent of "<<n<<" in reverse order is: ";

   while (n > 0)
    {
   cout << n%2;
   n = n/2;
    }

  }
   else
  {
    cout << "Please enter a number greater than zero." << endl;
  }
 }
 return 0;
 }

#include<iostream.h>
#include <stdio.h>
int main()
  {
int n,x,i, j, k;
cout<<"Enter an integer in the decimal number system: ";
cin>>n;
x=n; //assign the value entered for x to n
cout<<"Binary equivalent of the "<<x<<" "<<"is: ";
  for( i=1;x!=0;i++)
  {
   x=x/2;
  }
  i=i-2;
 for (j= i; j>= 0; j--)
  {
 k = n >> j;
 if (k & 1)
 cout<<"1";
  else
  cout<<"0";
  }
 return 0;
}

#include <iostream.h>
#include <math.h>
void main()
{
int num, a=0;
cout<<"enter a number: ";
cin>>num;
for(int i=2;i<num;i++)//loop begins at 2 since 1 can divide any number
{
  if(num%i==0)
  {
  a++;
  }
 }
 if(a==0)
 {
   cout<<num<<" is a prime number";
 }
  else
  cout<<num<<"is not a prime";
}

//C++ program that computes the least common multiple of two integers. These are represented as a and b below.

#include<iostream.h>
#include<conio.h>
void main()
{
int a,b,i,j; //Variable declarations
clrscr;
cout<<"enter a number: ";
cin>>a;
cout<<"enter a number: ";
cin>>b;
i=a ;
j=b;
 if(a==0||b==0) //Checks if either a OR b is 0
 cout<<" The LCM is 0"; //If 0 from the condition above, a display message is output to the screen
 else
 {
  while(a!=b)//While the value of a is not equal to b execute the statements below
  {
  if(a>b)
  b=b+j;
  else
  if(a<b)
  a=a+i;
  }
  cout<<"LCM:"<<" "<<a;
  }
 }

#include<iostream.h>
#include<math.h>
#include<conio.h>
void main()
{
int a,b,c;
clrscr();
cout<<"enter the first value";
cin>>a;
cout<<"enter  the second value";
cin>>b;
cout<<"enter the third value";
cin>>c;
if (a>b&&b>c)
cout<<"The greatest is: "<<a;
else
if(a<b&&b>c)
cout<<"The greatest is: "<<b;
else
if(a<b&&b<c)
cout<<"The greatest is: "<<c;
else
if(a==b&&b==c)
cout<<"Non is greater!!";
}

#include <iostream.h>
#include <conio.h>
void main ()
{
const int nos=10;
const int noc=5;
char name [nos];
float scores [nos][noc];
float sum[nos], ave[nos];
int i,j;

    for (i=1;i<nos; i++)
    {
      cout<<"Enter name of student: "<<i<<endl;
      cin>>name;
         
         for(j=1;j<=noc;j++)
         {
           cout<<" enter the score: "<<j<<endl;
           cin>> score[i][j];
           sum[i]=score[i][j];
           }

   ave[i]=sum[i]/5;

    cout<<"Average Score For"<<" "name<<" "<<ave[i]<<endl;
  }
}

#include <conio.h>
#include<stdio.h>
struct gra
{
   int count, earn;
   char name[30];
    }
      
      loop[3];
      void main()
       {
       clrscr;
           
            for (int i=0;i<3;i++)
            {
            printf("Enter the employee number: ");
            scanf("%d",&loop[i].count);
            printf("\nEnter Employees's name: ");
            scanf("%s",&loop[i].name);
            printf("\nEnter the earnings: ");
            scanf("%d",&loop[i].earn);
            }
      for (i=0;i<3;i++)
      {
         printf("%4d",loop[i].count);
         printf("%8s",loop[i].name);
         printf("%4d",loop[i].earn);
       }
 getch();
}

#include <iostream.h>
int main()
{
  char alphabet;

  cout<<"enter an character: ";
  cin>>alphabet;
   int Ascii=alphabet;
    if (Ascii>=97 && Ascii<=122)
     {
      cout<<"the Ascii equivalent of "<<alphabet<<" is: "<<Ascii<<endl;
      cout<<"alpabet is a small letter";
     }
      else if (Ascii>=65 && Ascii<=90)
       {
        cout<<"the Ascii equivalent of "<<alphabet<<" is:" <<Ascii<<endl;
        cout<<"The alphabet is a capital letter";
         
           else if (Ascii>=47 && Ascii<=57)
          {
            cout<<"the Ascii equivalent of "<<alphabet<<"is: "<<Ascii<<endl;
            cout<<"You entered a number";
          }
             else if (Ascii>=0 && Ascii>=47 || Ascii>=54 && Ascii<=64 || Ascii>=91 && Ascii<=96 || Ascii >=123 && Ascii<=127)
            {
              cout<<"the Ascii equivalent of "<<alphabet<<"is:"<<Ascii<<endl;
              cout<<"you entered a special character";
            }
  return 0;
  }