Question

Create a program that adds 3 assignment marks together and calculate how many more marks they need to pass the course.

• Assignment 1 has a total of 30 marks
• Assignment 2 has a total of 30 marks
• Assignment 3 has a total of 40 marks

To pass the course, you will need to get 50 marks or over.

Output Example

Assignment 1 mark: 10

Assignment 2 mark: 12

Assignment 3 mark: 17

Marks still needed to pass the course: 11

If you input characters, it should print the message Please enter a number and not characters and then ask for that assignment mark again.

(HINT: Use a try-catch block. When you try to convert it to an integer and it fails, the exception should be caught and handled appropriately)

Output Example

Assignment 1 mark: qweqwe2s

Please enter a number and not characters

Assignment 1 mark: asdasd

Please enter a number and not characters

Assignment 1 mark: 12

If you enter anything more than each assignment's maximum marks or a mark less than 0, the program will print: You can't get less than 0 or more than the maximum mark. It will then loop again (HINT) and asks for that assignment mark again.

Output Example

Assignment 1 mark: 12

Assignment 2 mark: 55

You can't get less than 0 or marks more than the maximum mark!

Assignment 2 mark: 13

Assignment 3 mark: -4

You can't get less than 0 or marks more than the maximum mark!

Assignment 3 mark:

Add a stop feature so when the user enters stop, it should print out 'Exited!' and then terminate the program.

Output Example

Assignment 1 mark: 12

Assignment 2 mark: 13

Assignment 3 mark: stop

Exited!

Assume that any valid marks entered for each assignment add up to less than 50.

Answer 1

CODE

#include<iostream>
#include<cstdlib>
#include<stdexcept>

using namespace std;

int main() {
        //variables to store marks
        string mark1, mark2, mark3;
        //variable to store the sum of marks
        int sum = 0;
        //reading and validating assignment 1 mark 
        while(1) {
                //reading mark 1
                cout << "Assignment 1 mark: ";
                cin >> mark1;
                //checking if the input is stop, if yes exits out of program
                if(mark1 == "stop") {
                        cout << "Exited!" << endl;
                        exit(1);
                }
                //try block checking if the input is not a number
                try {
                        if(!stoi(mark1))
                                throw invalid_argument("Exception");
                }
                //catch block printing the error
                catch(invalid_argument& e) {
                        cout << "Please enter a number and not characters" << endl;
                        continue;
                }
                //checking if input is in the range of mark
                if(stoi(mark1) < 0 or stoi(mark1) > 30) 
                        cout << "You can't get less than 0 or more than the maximum marks!" << endl;
                else {
                        //adding mark to sum
                        sum += stoi(mark1);
                        break;
                }
        }
        //reading and validating assignment 2 mark
        while(1) {
                //reading mark 2
                cout << "Assignment 2 mark: ";
                cin >> mark2;
                //checking if the input is stop, if yes exits out of program
                if(mark2 == "stop") {
                        cout << "Exited!" << endl;
                        exit(1);
                }
                //try block checking if the input is not a number
                try {
                        if(!stoi(mark2))
                                throw invalid_argument("Exception");
                }
                //catch block printing the error
                catch(invalid_argument& e) {
                        cout << "Please enter a number and not characters" << endl;
                        continue;
                }
                //checking if input is in the range of mark
                if(stoi(mark2) < 0 or stoi(mark2) > 30) 
                        cout << "You can't get less than 0 or more than the maximum marks!" << endl;
                else {
                        //adding mark to sum
                        sum += stoi(mark2);
                        break;
                }
        }
        //reading and validating assignment 3 mark
        while(1) {
                //reading mark 3
                cout << "Assignment 3 mark: ";
                cin >> mark3;
                //checking if the input is stop, if yes exits out of program
                if(mark3 == "stop") {
                        cout << "Exited!" << endl;
                        exit(1);
                }
                //try block checking if the input is not a number
                try {
                        if(!stoi(mark3))
                                throw invalid_argument("Exception");
                }
                //catch block printing the error
                catch(invalid_argument& e) {
                        cout << "Please enter a number and not characters" << endl;
                        continue;
                }
                //checking if input is in the range of mark
                if(stoi(mark3) < 0 or stoi(mark3) > 40) 
                        cout << "You can't get less than 0 or more than the maximum marks!" << endl;
                else {
                        //adding mark to sum
                        sum += stoi(mark3);
                        break;
                }
        }
        //printing the marks needed to pass
        cout << "Marks still needed to pass the course: " << 50 - sum << endl;
        
        return 0;
}

CODE SCREENSHOT

OUTPUT