Q29: Write a C++ program to calculate the summation of the following sequence for nth terms.
𝑆𝑢𝑚 = 1/1 + 2/4 + 3/9 + ....

#include <iostream> 
using namespace std; 
 
int main()  
{
int n;
double sum = 0;
cout<<" enter the value of n : ";
cin>>n;
for( int i = 1; i <= n; i++)
{
sum += float (i) / (i*i);
}
cout<<" the summation the following sequence for "<<n<<" is : "<<sum<<endl;
return 0; 
}

Q30: C++ code to find the summation of the following series.
Sum = a + a^2 + a^3 + ... + a^n

#include <iostream>
using namespace std;

int main() {
    int a, n;
    int sum = 0;

    cout << "Enter the value of 'a': ";
    cin >> a;

    cout << "Enter the value of 'n': ";
    cin >> n;

    // Calculating the summation of the series
    for (int i = 1; i <= n; ++i) {
        int term = 1;
        for (int j = 1; j <= i; ++j) {
            term *= a;
        }
        sum += term;
    }
    cout << "The summation of the series is: " << sum << endl;

    return 0;
}

Q31: C++ code to find the summation of the following series for nth terms.
𝑆𝑢𝑚 = 1/a^1 + 2/a^2 + 3/a^3 + ....

#include <iostream>
using namespace std;

int main() {
    int a, n;
    float sum = 0.0;
    float power_of_a = 1.0;

    cout << "Enter the value of 'a': ";
    cin >> a;

    cout << "Enter the value of 'n': ";
    cin >> n;

    // Calculating the summation of the series
    for (int i = 1; i <= n; ++i) {
        power_of_a *= a; // Update power_of_a by multiplying it by a
        sum += float(i) / power_of_a;
    }

    cout << "The summation of the series up to the " << n << "th term is: " << sum << endl;

    return 0;
}

Q32: C++ code to find the summation of the following series.
Sum = 1 + 2! + 3! + ⋯ + n!

#include <iostream>
using namespace std;

int main() {
    int n;
    int sum = 0;
    int factorial = 1;

    cout << "Enter the value of 'n': ";
    cin >> n;

    for (int i = 1; i <= n; ++i) {
        factorial *= i;
        sum += factorial; 
    }

    cout << "The summation of the series is: " << sum << endl;

    return 0;
}

Q33: Grades in the programming lab are classified according to letters A case of Excellent, B case of Well done, C case of done, D case of Pass and F case of Try again.
Write C++ code to implement this logic using Switch statement.

#include <iostream>
using namespace std;
int main ()
{
char grade ;
cout << " take one from this ( A , B, C, D, F) ";
cin >> grade;
switch(grade)
{
case 'A' :
cout << "Excellent!" << endl;
break;
case 'B' :
cout << "Well done" << endl;
break;
case 'C' :
cout << "done" << endl;
break;
case 'D' :
cout << "You passed" << endl;
break;
case 'F' :
cout << "Better try again" << endl;
break;
default :
cout << "Invalid grade" << endl;
}
cout << "Your grade is " << grade << endl;
return 0;
}

Q34: Create a C++ program that takes five integers as input and determines whether their product is positive or negative.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int num1, num2, num3, num4, num5; 
    int product; 
 
    cout << "Enter five integers: "; 
    cin >> num1 >> num2 >> num3 >> num4 >> num5; 
 
    product = num1 * num2 * num3 * num4 * num5; 
 
    if (product > 0)  
 { 
        cout << "The product is positive." << endl; 
    }  
 else if (product < 0)  
 { 
        cout << "The product is negative." << endl; 
    } 
  else  
 { 
        cout << "The product is zero." << endl; 
    } 
 
    return 0; 
}

Q35: Write a C++ program that takes a day number (1-7) as input and prints the corresponding day of the week.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int daynumber; 
 
    cout << " enter the day ( 1 -7 ) : "; 
    cin >> daynumber;
    switch (daynumber)
    {
    case 1:
    cout<< " sunday "<<endl;
    break;
    case 2:
    cout<< " monday "<<endl;
    break;
    case 3:
    cout<< " tuseday "<<endl;
    break;
    case 4:
    cout<< " wednesday "<<endl;
    break;
    case 5:
    cout<< " thursday "<<endl;
    break;
    case 6:
    cout<< " friday "<<endl;
    break;
    case 7:
    cout<< " saturday "<<endl;
    break;
    default:
    cout<<" not defined/true "<<endl;
    }
    
    return 0; 
}

Q36: Write a C++ program that determines if a person is eligible to vote based on their age. Consider the legal voting age as 18.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int age;
    cout<<" enter your age : ";
    cin>>age;
    if ( age >= 18)
    {
    cout<< " you are eligible to vote "<<endl;
    }
    else
    {
    cout<< " you are not eligible to vote "<<endl;
    }
    return 0; 
}

Q37: Write C++ program takes an input of a person first name and uses a switch statement to output the corresponding person's age (consider three persons)

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    char firstName; 
 
    cout << "Enter a person's first initial (A/B/C): "; 
    cin >> firstName; 
 
    switch (firstName)  
 { 
        case 'A': 
        case 'a': 
            cout << "The age of person with first initial A is: 25" << endl; 
            break; 
        case 'B': 
        case 'b': 
            cout << "The age of person with first initial B is: 30" << endl; 
            break; 
        case 'C': 
        case 'c': 
            cout << "The age of person with first initial C is: 35" << endl; 
            break; 
        default: 
            cout << "Unknown person" << endl; 
    } 
 
    return 0; 
}

Q38: Implement a C++ program that converts an amount in one currency to another. Ask the user for the input currency, amount, and desired currency.

#include <iostream>
using namespace std;

int main() 
{
    float currency, currency1, ratio;
    cout<<" enter the your currency : ";
    cin>>currency1;
    cout<<" enter the different between the currencies : ";
    cin>>ratio;
    currency = currency1 / ratio;
    cout<<currency<<endl;
    
    return 0;
}

Q39: Write C++ Program which computes area of circle. The program takes radius of the circle as an input, calculates the area of the circle and outputs it on the screen.
(Area =𝜋𝑟²).

#include <iostream>
using namespace std;

int main() 
{
    float r, area;
    cout<<" enter the radius : ";
    cin>>r;
    area = r * r * 3.14;
    cout<<" the area is : "<<area<<endl;
    
    return 0;
}

Q40: Write C++ code to computes area of a shape using switch case.
The program takes shape as an input and identifies the shape using a switch case. The statements then take required values as input, computes the area and prints it.
(assume two shapes only, square and rectangle)

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    char shape; 
    float side, length, width, area; 
 
    cout << "Enter the shape (S for square, R for rectangle): "; 
    cin >> shape; 
 
    switch (shape)  
 { 
        case 'S': 
        case 's': 
            cout << "Enter the side length of the square: "; 
            cin >> side; 
            area = side * side; 
            break; 
        case 'R': 
        case 'r': 
            cout << "Enter the length of the rectangle: "; 
            cin >> length; 
            cout << "Enter the width of the rectangle: "; 
            cin >> width; 
            area = length * width; 
            break; 
        default: 
            cout << "Invalid shape" << endl; 
    } 
 
    cout << "The area of the shape is: " << area << endl; 
 
    return 0; 
}

Q41: Implement a C++ code to decide the car type depending on the number of seats.
Print an appropriate massage to indicate a car type.
(Saloon has four seats, SUV has seven seats and Bus has more than seven seats).

#include <iostream> 
using namespace std; 
 
int main() { 
    int numSeats; 
 
    cout << "Enter the number of seats in the car: "; 
    cin >> numSeats; 
 
    if (numSeats == 4)  
 { 
        cout << "This is a Saloon car." << endl; 
    }  
 else if (numSeats == 7) { 
        cout << "This is an SUV." << endl; 
    }  
 else if (numSeats > 7 && numSeats < 100 )  
 { 
        cout << "This is a Bus." << endl; 
    }  
 else  
 { 
        cout << "Invalid number of seats." << endl; 
    } 
 
    return 0; 
}

Q42: Consider two integer numbers A=7 and B=14.
Write C++ program to implement the following assignment operator.
1- Left shift operator. (shift by 2).
2- Modulus operator.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int A = 7, B = 14; 
 
    A = A << 2;
    B = B << 2;
     
    B = A % B; 
 
    cout << "After left shifting A by 2: " << A << endl;
    cout << "After left shifting B by 2: " << B << endl; 
    cout << "After using modulus operator on B: " << B << endl; 
 
    return 0; 
}

Q43: Consider two integer numbers C=8 and D=4.
Write C++ program to implement the following assignment operator.
1- Right shift operator. (shift by 1)
2- Bitwise AND assignment operator.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int C = 8, D = 4;
    
    C = C >> 1;
    D = D >> 1;
     
    C &= D; 
 
    cout << "After right shifting C by 1: " << C << endl;
    cout << "After right shifting D by 1: " << D << endl; 
    cout << "After using bitwise AND operato on C,D : " << C << endl; 
 
    return 0; 
}

Q44: Consider two integer numbers N=11 and M=9.
Write C++ program to implement the following assignment operator.
1- Divide AND assignment operator.
2- Bitwise inclusive OR and assignment operator.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int N = 11, M = 9;
    
    N /= M;
    N |= M;
     
    cout << "After using Divide AND assignment operator : " << N << endl; 
    cout << "After using Bitwise inclusive OR and assignment operator : " << N << endl; 
 
    return 0; 
}

Q45: Consider two integer numbers X=1 and Y=0.
C++ program to implement the following logical operator.
1- Logical AND operator.
2- Logical NOT Operator.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int X = 1, Y = 0;
    
    cout << "After using Logical AND operator X,Y: " << (X&&Y) << endl; 
    cout << "After using Logical NOT Operator on X : " << !X << endl;
    cout << "After using Logical NOT Operator on Y : " << !Y << endl; 
 
    return 0; 
}

بهذا تكتب متغيرات بغير اسم او تشيل bool وتكتب int
بالاثنين صح

Q46: Write C++ code to determine the size of various data type on a computer.
(use character and Boolean only).

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    char character;
    bool boolean;
    cout << "Size of char: " << sizeof(character) << " bytes" << endl; 
    cout << "Size of bool: " << sizeof(boolean) << " bytes" << endl; 
 
    return 0; 
}

Q47: Write C++ code to determine the size of various data type on a computer.
(use Floating point and integer only).

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int integer; 
    float floatingPoint; 
 
    cout << "Size of int: " << sizeof(integer) << " bytes" << endl; 
    cout << "Size of float: " << sizeof(floatingPoint) << " bytes" << endl; 
 
    return 0; 
}

Q48: Write C++ code to determine the size of various data type on a computer.
(use character and double only).

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    char character; 
    double doubleonly; 
 
    cout << "Size of int: " << sizeof(character) << " bytes" << endl; 
    cout << "Size of float: " << sizeof(doubleonly) << " bytes" << endl; 
 
    return 0; 
}

Q49: Consider two integer numbers U=15 and V=8.
C++ program to implement the following operator description.
1- Checks if the values of two operands are equal or not.
2- Checks if the value of left operand is greater than or equal to the value of right operand.

#include <iostream> 
using namespace std; 
 
int main()  
{ 
    int U = 15, V = 8;
    bool areEqual = (U == V);
    bool isGreaterOrEqual = ( U >= V);
    
    cout << "Are the values of U and V equal? " << areEqual << endl; 
    cout << "Is U greater than or equal to V? " << isGreaterOrEqual << endl;
     
    return 0; 
}