C++ program to add subtract and multiply two complex numbers

//C++ Program to add subtract and Multiply Complex Numbers
#include<iostream>
using namespace std;
#include<math.h>

//Declare structure
   struct complex
   {
     int real,img;
   };

   int main()
   {
      complex a,b,c;
      int choice;
   cout<<"Enter First Complex Number:"<<endl;
   cout<<"Enter Real Part of First Complex No=";
   cin>>a.real;
   cout<<"Enter imaginary Part of First Complex No.=";
   cin>>a.img;
   cout<<endl;
   cout<<"Enter Second Complex Number:"<<endl;
   cout<<"Enter Real Part of Second Complex No =";
   cin>>b.real;
   cout<<"Enter imaginary Part of Second Complex No.= ";

   cin>>b.img;

   cout<<endl;
   cout<<"\tEnter 1 to add two complex number \n";
   cout<<"\tEnter 2 to subtract two complex numbers\n";
   cout<<"\tEnter 3 to multiply two complex numbers\n";
   cout<<"Enter your choice ";
   cin>>choice;
   switch(choice)
    {
     case 1:
       {
      //add real with real
      c.real=a.real+b.real;
      //add imaginary with imaginary
      c.img=a.img+b.img;
      cout<<"********************************************************"<<endl;

      //to check whether the imaginary part is positive or negative
      if (c.img<0)
      cout<<"\nThe Sum Of 1st and 2nd Complex No. = "<<c.real<<c.img<<"i"<<endl;

      else
      cout<<"\nThe Sum Of 1st and 2nd Complex No. = "<<c.real<<"+"<<c.img<<"i"<<endl;
      break;
         }
  case 2:
      {
      c.real=a.real-b.real;
      c.img=a.img-b.img;

      if (c.img<0)
      {
        cout<<"\nThe Difference of 1st and 2nd Complex No is = "<<c.real<<c.img<<"i"<<endl;
      }
      else
       cout<<"\nThe Difference of 1st and 2nd Complex No is = "<<c.real<<"+"<<c.img<<"i"<<endl;
       break;
     }
  case 3:
    {
   //multipication of complex Nos start here

      c.real=(a.real*b.real+(a.img*b.img)*-1);
      c.img=a.img*b.real+b.img*a.real;

      if (c.img<0)
         {
         cout<<"\nThe Product of 1st and 2nd Complex No is = "<<c.real<<c.img<<"i"<<endl;
         }
      else
       cout<<"\nThe Product of 1st and 2nd Complex No is = "<<c.real<<"+"<<c.img<<"i"<<endl<<endl;
            break;
      }
    }
   return 0;
 }

C++ program to find average of ten numbers

//program to find average of ten numbers enter by user
#include <iostream>
using namespace std;

 int main()
   {
      int num,sum=0,count=0,avg;
      cout<<"Enter ten numbers to find its average"<<endl;
     for(int i=0;i<10;i++)
      {
         cout<<"Enter number "<<i+1<<" : ";
         cin>>num;
         sum=sum+num;
         count++;
      }
      avg=sum/count;
      cout<<"\nAverage of ten Numbers is = "<<avg<<endl;
      return 0;
   }

C++ program to convert seconds into hours minutes and seconds

//program to convert seconds into hours minutes and seconds
#include <iostream>
using namespace std;

 int main()
   {
       int sec,min,hr,sec1;
       cout<<"Enter seconds : ";
       cin>>sec;
       hr=sec/3600;
       sec=sec%3600;
       min=sec/60;
       sec1=sec%60;

       cout<<"\nNumber of hours = "<<hr<<endl;
       cout<<"Number of minutes = "<<min<<endl;
       cout<<"Number of seconds = "<<sec1<<endl;

      return 0;
   }

C++ program to print multipication table of a number

#include <iostream>
using namespace std;

 int main()
   {
       int num,i=1;
      cout<<"Enter Number to Make its table: ";
      cin>>num;
      while(i<=10)
      {
       cout<<num<<" * "<<i<<" = "<<num*i<<endl;
        i++;

      }
      return 0;
   }

C++ perfect number program

/*program to check whether a number is perfect
or not. Perfect numbers are those whose factors
sum is equal to the number itself e.g 6 and 28 are perfect
factorsSum   1+2+3=6    1+2+4+7+14=28  */

#include <iostream>
using namespace std;

 //function to find perfect number
void perfectNum(int x)
{
   int factorSum=0;
   for(int i=1;i<x;i++)
   {
      if(x%i==0)
      {
      //nested if to print factors 1+2+4....
       if(i==1)
       {
          cout<<"\n"<<i;
          factorSum=factorSum+i;
       }
       else
       {
          cout<<"+"<<i;
          factorSum=factorSum+i;
       }
      }

   }
   if(factorSum==x)
   {
      cout<<"="<<x;
      cout<<"\n\nThe number "<<x<<" is perfect\n";
   }
   else
   {
      cout<<" not = "<<x;
      cout<<"\n\nThe number "<<x<<" is not perfect"<<endl;
   }
}

int main()
 {
    int num;;
    cout<<"Enter a number ";
    cin>>num;
    perfectNum(num);

 return 0;
}

C++ program to find Permutation and Combination

// Program to find permutation(nPr) and combination(nCr)
#include <iostream>
using namespace std;
//recursive function to find factorial
 int fact(int a)
 {
    if(a>1)
    {
       return a*fact(a-1);
    }
    else
    {
       return 1;
    }
 }

int main()
 {
int num1,num2,num3,n,r,choice;
cout<<"Enter the value of n ";
cin>>n;
cout<<"Enter the value of r ";
cin>>r;
if(n<r)
   {
      cout<<"The value of n must be greater than r "<<endl;
      cout<<"Enter again ";
      cin>>n>>r;
   }
cout<<"\tEnter 1 to find permutation "<<endl;
cout<<"\tEnter 2 to find Combination\n "<<endl;
cout<<"Enter Your choice ";
cin>>choice;
switch(choice)
{
   case 1:
      {
         num1=fact(n);
         num2=fact(n-r);
         num3=num1/num2;
         cout<<"nPr = "<<num3<<endl;
         break;
      }
   case 2:
      {
         num1=fact(n);
         num2=fact(n-r)*fact(r);
         num3=num1/num2;
         cout<<" nCr = "<<num3<<endl;
         break;
      }
   default:
      {
         cout<<"You Entered an incorrect choice :"<<endl;
         break;
      }
}


return 0;
}

C++ program to make simple calculator

#include <iostream>
using namespace std;

int main()
{
    int num1,num2,numStore,choice;
    cout<<"Enter first number : ";
    cin>>num1;
    cout<<"Enter second number : ";
    cin>>num2;
    cout<<"\t\tEnter 1 for addition\n";
    cout<<"\t\tEnter 2 for subtraction\n";
    cout<<"\t\tEnter 3 for multipication\n";
    cout<<"\t\tEnter 4 for Division\n";
    cout<<"Enter Your Choice : ";
    cin>>choice;
    switch(choice)
    {
    case 1:
      {
         numStore=num1+num2;
         cout<<"The sum of two numbers "<<num1<<" and "<<num2<<" is = "<<numStore;
         break;
      }
      case 2:
      {
         numStore=num1-num2;
         cout<<"The difference of two numbers "<<num1<<" and "<<num2<<" is = "<<numStore;
         break;
      }
      case 3:
      {
       numStore=num1*num2;
      cout<<"The product of two numbers "<<num1<<" and "<<num2<<" is = "<<numStore;
         break;
      }
      case 4:
      {
         if(num2==0)
         {
            cout<<"Division by Zero is not Possible";
            break;
         }

      numStore=num1/num2;
      cout<<"The result of division of two numbers "<<num1<<" and "<<num2<<" is = "<<numStore;
         break;
      }
    }
     cout << endl;
   return 0;
}

C++ program to find factors of number entered by User

//C++ program to find factors of a number
#include <iostream>
using namespace std;
int main()
{
    int number,i ;

    cout << "Enter the number to find its factors : ";
    cin >> number;
    cout << "The factors of " << number << " are : ";

   for(i=1;i<number;i++)
   {
      if(number%i==0)
      {
         cout<<i<<" ";
      }
   }
     cout << endl;
 return 0;
}

C++ program to find Factorial of a number

 //C++ program to find factorial of number using function
#include <iostream>
using namespace std;
void fact(int a)
{
   int num=1;
   for(int i=1;i<=a;i++)
   {
      num=num*i;
   }
   cout<<"\nThe factorial of the number "<<a<<" is = "<<num;
}


int main()
 {
 int num;
 cout<<"Enter a number to find its Factorial ";
 cin>>num;
 fact(num);

 return 0;
}

C++ program to find Factorial of number using Recursion

//C++ program to find factorial of number using recursive function
#include <iostream>
using namespace std;
int fact(int a)
{
   if(a>1)
   {
      return a*fact(a-1);
   }
   else
   {
      return 1;
   }
}


int main()
 {
int num,num1;
cout<<"Enter a number to find its Factorial ";
cin>>num;
num1=fact(num);
cout<<"The factorial of the number "<<num<<" is = "<<num1;

return 0;
}

C++ program to find sum of Natural numbers

/*this program find sum of
 natural numbers upto the range entered by user*/
#include <iostream>
using namespace std;

int main()
 {
 int sumStore=0,i,Srange,Erange;
 cout<<"Enter start range ";
 cin>>Srange;
 cout<<"Enter End range ";
 cin>>Erange;
 for(i=Srange;i<=Erange;i++)
   {
      sumStore=sumStore+i;
   }

 cout<<"\nSum of Natural numbers from "<<Srange<<" to "<<Erange<<" is= "<<sumStore;
 cout<<endl;
 return 0;
}

C++ program to Reverse a number

#include <iostream>
using namespace std;

int main()
 {
 int sumStore=0,num,rem,num1;
 cout<<"Enter a number to Reverse it ";
 cin>>num;
 num1=num;
 while(num>0)
   {
      rem=num%10;
      //to store number
      sumStore=(sumStore*10)+rem;
      num=num/10;

   }
   cout<<"\nThe Reverse of "<<num1<<" is "<<sumStore<<endl;

 return 0;
}

C++ Palindrome number program

#include <iostream>
using namespace std;

int main()
 {
int sumStore=0,num,rem,palindrome,num1;
cout<<"Enter a number ";
cin>>num;
palindrome=num;
num1=num;
//loop to check every digit of number Entered
while(num!=0)
   {
      rem=num%10;
      //to store number
      sumStore=(sumStore*10)+rem;
      num=num/10;

   }
   //to check Entered number is palindorme or not
   if(sumStore==palindrome)
   {
      cout<<"The Number "<<num1<<" is Palindrome"<<endl;
   }
   else
   {
      cout<<"The Number "<<num1<<" is not Palindrome"<<endl;

   }

return 0;
}

C++ program to find sum of Odd numbers

#include <iostream>
using namespace std;

int main()
 {
 int sumStore=0,i,Srange,Erange;
 cout<<"Enter start range ";
 cin>>Srange;
 cout<<"Enter End range ";
 cin>>Erange;
 for(i=Srange;i<=Erange;i++)
   {
      if(i%2!=0)
      {
         sumStore=sumStore+i;
      }
   }
   cout<<endl;
 cout<<"Sum of odd numbers from "<<Srange<<" to "<<Erange<<" is = "<<sumStore<<endl;
 return 0;
}

C++ program to convert Decimal to Binary

#include <iostream>
using namespace std;

int main()
 {
 int sumStore=0,base=1,dec,num,rem;

 cout<<"Enter a decimal number : ";
 cin>>num;
 dec=num;

  while(num!=0)
    {
      rem=num%2;
      sumStore=sumStore+(rem*base);
      base=base*10;
      num=num/2;

    }

 cout<<"\nThe binary Equivalent of Decimal No "<<dec<<" is = "<<sumStore<<endl;


 return 0;
}

C++ program to convert Binary to Decimal

#include <iostream>
using namespace std;

int main() {
int sumStore=0,base=1,bin,num,num1,rem;

cout<<"Enter a binary number : ";
cin>>num;
bin=num;
num1=num;

  //Loop to check the number is binary or not
while(num!=0)
   {

if((num%10!=0 )&& (num%10!=1))
     {
      cout<<"The number "<<bin<<" is not binary\n";
      return 0;
     }

      num=num/10;

    }
    //if number is binary then this loop will execute
   while(num1!=0)
    {
      rem=num1%10;
      sumStore=sumStore+(rem*base);
      base=base*2;
      num1=num1/10;

    }
   cout<<"\nThe decimal Equivalent of binary No "<<bin<<" is = "<<sumStore<<endl;


return 0;
}

C++ program to find Sum of digits of a number Entered by User

#include <iostream>
using namespace std;

int main(void) {
int sum=0,count=0,i,a,rem,num;

cout<<"Enter a number to sum its digits : ";
cin>>num;
a=num;
for(i=0;num!=0;i++)
   {
      rem=num%10;
      sum=sum+rem;
      num=num/10;
      count++;

   }
   cout<<"\nThe sum of "<<count<<" digited number "<<a<<" is = "<<sum<<endl;
return 0;
}

C++ program to swap two numbers

#include<iostream>
using namespace std;


void swap(int & i,int & j);


int main()
   {
   int num1, num2;
   cout<<"Enter first Number :";
   cin>>num1;
   cout<<"Enter Second Number :";
   cin>>num2;
   cout<<endl<<endl;

    cout << "Before swapping:"<<endl;
    cout<<"First Number is = " << num1<<endl;

 cout<<"Second number is = " << num2<<endl<<endl;

    swap(num1,num2);

    cout << "After swapping"<<endl;
    cout<<" First number is =  " << num1 <<endl;

 cout<<" Second number is = " << num2 <<endl<<endl;


     return 0;

}
void swap(int& i, int& j)
{
    int t = i;
    i = j;
 j = t;
}

C++ program to print diamond pattern

//C++ program to print diamond pattern
#include<iostream>
using namespace std;

int main()
{
   int rows,i,j;
   cout<<"Enter Number of rows ";
   cin>>rows;
    for(i=1;i<=rows;i++)
    {
       for(j=rows-i;j>=1;j--)
       {
     cout<<" ";
       }
       for(j=1;j<=i;j++)
       {
    cout<<"* ";

       }
       cout<<endl;
    }

   for(i=rows-1;i>=1;i--)
    {
       for(j=rows-i;j>=1;j--)
       {
     cout<<" ";
       }
       for(j=1;j<=i;j++)
       {
    cout<<"* ";

       }
  cout<<endl;}
return 0;
}

C++ program to print Inverted triangle

#include<iostream>
using namespace std;

int main()
{
   int rows,i,j;
   cout<<"Enter Number of rows ";
   cin>>rows;
   cout<<endl;

 for(i=rows-1;i>=1;i--)
    {
       for(j=rows-i;j>=1;j--)
       {
     cout<<" ";
       }
       for(j=1;j<=i;j++)
       {
    cout<<"* ";

       }
    cout<<endl;}
 return 0;
}

C++ program to print Triangle pattern of asterisks

#include<iostream>
using namespace std;

int main()
{
   int rows;
   cout<<"Enter Number of rows ";
   cin>>rows;

for (int j=0;j<rows;++j)
{
for(int k=rows-j;k>0;--k)
{
cout<<" ";
}
for (int m=0;m<j;++m)
{

{
cout<<"*"<<" ";
}

}
cout<<"   "<<endl<<"   ";
}
return 0;
}

C++ program to print Fabonacci series upto n terms

#include <iostream>
using namespace std;

int main()
{
   int i=0,j=1,sum=0,limit;

   cout<<"Enter limit for series :";
   cin>>limit;
   cout<<"The fabanacci series "<<"upto "<<limit<<" term is "<<i<<" ";

   for (int k=1;k<limit;k++)
   {

      sum=i+j;
      cout<<sum<<" ";
      i=i+j;
      j=i-j;

   }
   cout<<endl;
return 0;

}

C++ Tower of Hanoi program

#include <iostream>
using namespace std;
#include<math.h>

int move;
void movetower(int n,char from,char to,char temp);
void movedisk(char from,char to);
int main()
{
    int disks,moves;
    cout<<"\t\tWelcome to Tower of Hanoi Program : "<<endl;
    cout<<"\t\tEnter number of disks ";
    cin>>disks;
    cout<<endl;
    movetower(disks,'1','2','3');
    // to count total number of moves of disk
    moves=(pow(2,disks))-1;

    cout<<"\n\t\tTotal moves is = "<<moves<<endl;
    return 0;
}
void movetower(int n,char from,char to,char temp)
{
   if (n==1)
{


      movedisk(from,to);
}
      else
      {
         movetower(n-1,from,temp,to);
         movedisk(from,to);
         movetower(n-1,temp,to,from);
      }


}
void movedisk(char from,char to)
{

   cout<<"\t\tMove top disk from "<<from<<" to "<<to<<endl;

}

C++ program to find Prime Numbers between two Numbers

//C++ program to Find prime Numbers b/w two intervals

   #include <iostream>
   #include<conio.h>
   using namespace std;
    int prime(int a)
    {
       int count=0;
      for(int i=2;i<a;i++)
         {
            if(a%i==0)
             {
                 count++;
             }
         }
         if(count==0)
          {
            cout<<a<<" ";
          }
          return a;
    }

 int main()
   {
      int a,b;
      cout<<"Enter two numbers to find prime Number b/w it "<<endl;
      cout<<"Enter first No : ";
      cin>>a;
      cout<<"Enter second No : ";
      cin>>b;
      cout<<"\nThe prime number b/w "<<a<<" and "<<b<<" are "<<endl<<endl;
      for(int i=a+1;i<b;i++)
      {
        prime(i);
      }
      getch();
      return 0;
   }