Activecode Exercises

Answer the following Activecode questions to assess what you have learned in this chapter.

You are part of a class where everyone passes, but it’s very hard to pass with an A. Fix the function so it prints your letter grade according to this scheme. [0, 50) = C, [50, 85) = B, and [85, 100] = A. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> using namespace std; string whichDoor (double grade) { s = ""; if (grade < 50) { s = "C"; } if (grade < 85) { s = "B"; } if (grade >= 85) { s = "A"; } cout << s; }

You are part of a class where everyone passes, but it’s very hard to pass with an A. Fix the function so it prints your letter grade according to this scheme. [0, 50) = C, [50, 85) = B, and [85, 100] = A. Use the lines to construct the code, then go back to complete the Activecode tab.

        string whichDoor (double grade) {
---
void whichDoor (double grade) { #paired
---
    string s = "";
---
    s = ""; #paired
---
    if (grade < 50) {
        s = "C";
    }
---
    if (grade < 85 && grade >= 50) {
        s = "B";
    }
---
    if (grade < 85 || grade >= 50) { #paired
        s = "B";
    }
---
    if (grade >= 85) {
        s = "A";
    }
---
    cout << s;
}
        

Finish the code below so that it prints true if x is even and false if x is odd. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> using namespace std; void is_even (int num) { if (num % 2 == 0) { cout << true; } }

Finish the code below so that it prints true if x is even and false if x is odd. Use the lines to construct the code, then go back to complete the Activecode tab.

        void is_even (int num) {
---
    if (num % 2 == 0) {
        cout << "true";
    }
---
    if (num % 2 == 0) { #paired
        cout << true;
    }
---
    else {
        cout << "false";
    }
---
    else { #paired
        cout << false;
    }
---
}
        

Write the function greaterThan that prints true if the first double argument is greater than the second double argument. Be sure to include any necessary headers. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> using namespace std; void greaterThan () { }

Write the function greaterThan that prints true if the first double argument is greater than the second double argument. Be sure to include any necessary headers. Use the lines to construct the code, then go back to complete the Activecode tab.

        void greaterThan (double a, double b) {
---
void greaterThan (int a , int b) { #paired
---
    if (a > b) {
        cout << "true";
    }
---
    if (a < b) {
        cout << true;
    }
---
    else {
        cout << "false";
    }
---
    if (double a > double b) { #distractor
        cout << true;
    }
---
}
        

Write the function exclusiveOr that prints true If either a OR b is true, and prints false otherwise. Be sure to include any necessary headers. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> using namespace std; void exclusiveOr (bool a, bool b) { }

Write the function exclusiveOr that prints true If either a OR b is true, and prints false otherwise. Be sure to include any necessary headers. Use the lines to construct the code, then go back to complete the Activecode tab.

        void exclusiveOr (bool a, bool b) {
---
    if (a == true || b == true) {
        cout << "true";
    }
---
    if (a == true && b == true) { #paired
        cout << "true";
    }
---
    else {
        cout << "false";
    }
---
}
        

Write the function printNegativeNum that asks the user for a negative number. If the user does not provide a negative number, it should contine asking until the user provides one. It should then print the negative number. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> using namespace std; void printNegativeNum () { }

Write the function printNegativeNum that asks the user for a negative number. If the user does not provide a negative number, it should contine asking until the user provides one. It should then print the negative number. Use the lines to construct the code, then go back to complete the Activecode tab.

        void printNegativeNum () {
---
    int negative;
---
    cout << "Please provide a negative number." << endl;
---
    cin >> negative;
---
    if (negative >= 0) {
        printNegativeNum();
    }
---
    if (negative >= 0) { #paired
        cout << "Please provide a negative nunber." << endl;
    }
---
    cout << negative << endl;
---
}
        

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