Q1: Write a C++ code to swap two integer numbers and find the sum of them (use temp variable).

#include <iostream>
using namespace std;

int main()
{
    int a, b, temp;
    cout<<"enter the value of a ";
    cin >> a;
    cout<<"enter the value of b ";
    cin >> b;

   cout<< " before a = "<<a<<", b = "<<b<<endl;
   temp = a;
   a = b;
   b=temp;
   int sum = a + b;
   cout<<" after a = "<<a<<", b = "<<b<<endl;
   cout<<" the sum is : "<<sum<<endl;
return 0;
}

Q2: Write a C++ code to swap two integer numbers (use Bitwise exclusive OR operator).

#include <iostream>
using namespace std;

int main()
{
    int a, b, temp;
    cout<<"enter the value of a ";
    cin >> a;
    cout<<"enter the value of b ";
    cin >> b;

   cout<< " before a = "<<a<<", b = "<<b<<endl;
   a = a ^ b;
   b = a ^ b;
   a = a ^ b;
   cout<<" after a = "<<a<<", b = "<<b<<endl;
return 0;
}

Q3: Write a C++ program to read five numbers, find their sum, and print the numbers in reverse order.

#include <iostream>
using namespace std;

int main()
{
    int sum=0;
    int number [5];

    cout<<"enter the five number : "<<endl;

    for (int i = 0; i < 5; i++)
    {
        cout<<" number "<<i+1<<" : ";
        cin>>number[i];
        sum += number[i];
    }
    cout<<" the sum "<<sum<<endl;
    cout<<" number in reverse : "<<endl;
    for (int i = 4; i>=0; i--)
    {
        cout<< number[i]<<", ";
    }

    return 0;
}

Q4: Write a C++ program to find the sum and average of six numbers.

#include <iostream>
using namespace std;

int main()
{
    float sum=0;
    float average;
    float number [6];
    cout<< " enter the six number : "<<endl;
    for (int i = 0; i < 6; i++)
    {
        cout<<" number "<<i+1<<" : ";
        cin>>number[i];
        sum += number[i];
        average = sum/6;
    }
    cout<<" the sum "<<sum<<endl;
    cout<<" the average "<<average<<endl;
    return 0;
}

Q5: Write a C++ program to print the sequence of numbers (10, 11, 12 … 30). Use while loop statement.

#include <iostream>
using namespace std;
int main ()
{
int a = 10;
while ( a <= 30)
{
cout<<a<<", ";
a++;
}
return 0;
}

Q6: Write a C++ program to print the sequence of odd numbers from (11 - 29). Use while loop statement.

#include <iostream>
using namespace std;
int main ()
{
int a = 11;
while ( a <= 29)
{
cout<<a<<", ";
a += 2;
}
return 0;
}

Q7: Write a C++ program to print the sequence of even numbers from (10 - 30). Use while loop statement.

#include <iostream>
using namespace std;
int main ()
{
int a = 10;
while ( a <= 30)
{
cout<<a<<", ";
a += 2;
}
return 0;
}

Q8: Write a C++ program to print the sequence of numbers (15, 16, 17 … 30). Use do while loop statement.

#include <iostream>
using namespace std;
int main ()
{
int a = 15;
do
{
cout<<a<<", ";
a++;
}
while ( a < 30);
cout<<a<<", ";
return 0;
}

Q9: Write a C++ program to print the sequence of odd numbers from (11 - 29). Use do while loop statement.

#include <iostream>
using namespace std;
int main ()
{
int a = 11;
do
{
cout<<a<<", ";
a += 2;
}
while ( a < 29);
cout<<a<<", ";
return 0;
}

Q10: Write a C++ program to print the sequence of even numbers from (10 - 30). Use do while loop statement.

#include <iostream>
using namespace std;
int main ()
{
int a = 10;
do
{
cout<<a<<", ";
a += 2;
}
while ( a < 30);
cout<<a<<", ";
return 0;
}

Q11: Write a C++ program that takes two integers as input and checks if they are equal, greater than, or less than each other

#include <iostream>
using namespace std;
int main ()
{
int a, b;
cout<<"enter the value of a : ";
cin>>a;
cout<<"enter the value of b : ";
cin>>b;

if ( a == b )
{
cout<<" a equal b "<<endl;
}
else if ( a > b)
{
cout<<" a is greater than b "<<endl;
}
else if ( a < b )
{
cout<<" a is less than b "<<endl;
}
return 0;
}

Q12: Create a C++ program that determines whether a given year is a leap year or not. Provide appropriate messages based on the result.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int year; 
 
    cout << "Enter a year: "; 
    cin >> year; 
 
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))  
 { 
        cout << year << " is a leap year." << endl; 
    }  
 else  
 { 
        cout << year << " is not a leap year." << endl; 
    } 
 
    return 0; 
}

Q13: Implement a C++ program that takes a student's percentage as input and assigns a grade according to the following criteria:
90% and above: A
80-89%: B
70-79%: C
Below 70%: F

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int grade;
    cout<<" enter your grade ";
    cin>>grade;
    if ( grade > 90 )
    {
    cout<<" your grade is : A "<<endl;
    }
    else if ( grade > 80 )
    {
    cout<<" your grade is : B "<<endl;
    }
    else if ( grade > 70 )
    {
    cout<<" your grade is : C "<<endl;
    }
    else
    {
    cout<<" your grade is : F "<<endl;
    } 
    return 0; 
}

Q14: Write a C++ program to determine if a given number is positive, negative, or zero. Use appropriate conditional statements.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int num;
    cout<<" enter the number ";
    cin>>num;
    if ( num > 0 )
    {
    cout<<" the number is positive "<<endl;
    }
    else if ( num < 0)
    {
    cout<<" the number is negative "<<endl;
    }
    
    else
    {
    cout<<" the number is zero "<<endl;
    } 
    return 0; 
}