Question

1. a function named area to calculate the area of a rectangle

area = Length x width

2.a function named volume to calculate the volume of a sphere

volume = 4/3 x 3.14 x radius x radius x radius

3.a function named volume to calculate the volume of a cuboid

volume = Length x width x ht

4. Use a loop structure to calculate the sum of all odd numbers from 1 to 17

5) Use a loop structure to calculate the product of all even numbers from 1 to 13.

6.Write a program, which uses a selection structure (if/else) to calculate and print the student grades.

83 and above is an A

63 and above is a B

53 and above is a C

40 and above is a D

below 40 is fail.

7. Write statements that assign random integers to the variable n in the following ranges: Use the random function to generate the numbers. Put the statements in a Java Program and run it.

1. a) 1 ≤ n ≤ 51
2. b) 1 ≤ n ≤ 900
3. c) 0 ≤ n ≤ 391
4. d) 1000 ≤ n ≤ 5127
5. e) –17 ≤ n ≤ 22

8. Stimulate a coin tossing environment using random functions and using a for loop - toss the coin 100 times and print the number of heads and tails.
9. Write a program to convert US dollars to Pakistani rupees

Taka = 164*US;

Answer 1

# 1. Calculation of area of rectangle

#include<bits/stdc++.h>
using namespace std;
int area(int length, int width) // function for calculating the area
{
    return length*width;
}
int main()
{
    int length;
    int width;
    cout<<"Enter the length of rectangle: ";
    cin>>length;
    cout<<"Enter the width of rectangle: ";
    cin>>width;
    cout<<"the area of rectangle is "<<area(length, width);
}

#2. Program for calculating the volume of sphere

#include<bits/stdc++.h>
using namespace std;

double volume(int r) // function for calculating the volume of sphere
{
    double vol = (4/3)*3.14*r*r*r;
    return vol;
}
int main()
{
    int rad;
    cout<<"Enter the radius of the sphere: ";
    cin>>rad;
    cout<<"the area of rectangle is "<<volume(rad);
}

#3 Program to find the volume of the cuboid

#include<bits/stdc++.h>
using namespace std;
int volume(int l, int w, int h)
{
    return l*w*h;
}
int main()
{
    int length, width, ht;
    cout<<"Enter the length of the cuboid: ";
    cin>>length;
    cout<<"Ether the width of cuboid: ";
    cin>>width;
    cout<<"Enter the height of cuboid: ";
    cin>>ht;
    cout<<"the area of rectangle is "<<volume(length, width, ht);
}

#4. Sum of odd number from 1 to 17

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int sum =0;
    for(int i=1; i<=17; i++){
        if(i%2==1){ // it will check whether i is odd or not
            sum += i; // adding the odd values
        }
    }
    cout<<sum;
}

#5. Product of all even number from 1 to 13

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int product = 1;
    for(int i=1; i<=13; i++)
    {
        if(i%2==0){   // it will check whether i is even or not
            product *= i;
        }
    }
    cout<<product;
}

#6 Calculation and printing the grades:

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int marks;
    cout<<"Enter your marks: ";
    cin>>marks;
    if(marks>=83){
        cout<<"Your grade is : A";
    }
    else if(marks>=63){
        cout<<"Your grade is : B";
    }
    else if(marks>=53){
        cout<<"Your grade is : C";
    }
    else if(marks>=40){
        cout<<"Your grade is : D";
    }
    else{
        cout<<"You are Fail";
    }
}

#7. Random Number in given range

import java.io.*;
import java.util.Random; // for Random() function

class GFG {
        public static void main (String[] args) {
                Random rand = new Random(); 
  
        // Generate random integers in range 1 to 51 
        int randInt1 = rand.nextInt(51)+1; 
        System.out.println("Random Integers range 1 to 51: "+randInt1); 
        
        // Generate random integers in range 1 to 900
        int randInt2 = rand.nextInt(900)+1;
        System.out.println("Random Integers range 1 to 900: "+randInt2);
        
        //Generate random integers in range 0 to 391
        int randInt3 = rand.nextInt(392);
        System.out.println("Random Integers range 0 to 391: "+randInt3);
        
        //Generate random integers in range 1000 to 5128
        int randInt4 = 1000 + rand.nextInt(4128) + 1000;
        System.out.println("Random Integers range 1000 to 5127: "+randInt4);
        
        //Generate random integers in range -17 to 22
        int randInt5 = rand.nextInt(40)-17;
        System.out.println("Random Integers range -17 to 22: "+randInt5);
        }
}

#8. coin Tossing

import java.io.*;
import java.util.Random;

class GFG {
        public static void main (String[] args) {
                Random rand = new Random(); 
        int res = 0;
        int headCount = 0;
        int tailCount = 0;
        for(int i=0; i<100; i++){
            res = rand.nextInt(2); // it will generate only 0 and 1
            if(res==0){
                tailCount++;
            }
            else{
                headCount++;
            }
        }
        System.out.println("Head Count is: "+headCount);
        System.out.println("Tail count is: "+tailCount);
        }
}

#9. Dollar to Pakistani rupees

#include <iostream>
using namespace std;

int main() {
        int dollar;
        cout<<"Enter your Dollar value: ";
        cin>>dollar;
        int taka = 164*dollar;
        cout<<dollar<<" Dollar is "<<taka<<" Pakistani taka.";
        return 0;
}