Activecode Exercises

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

Fix the code below so that it prints “2 elephants”. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> using namespace std; void printAnimals(string a, int b) { cout << b << a; } int main () { // DO NOT MODIFY ANYTHING BELOW THIS LINE printAnimals(2, "elephants"); }

Fix the code below so that it prints “2 elephants”. Use the lines to construct the code, then go back to complete the Activecode tab.

        void printAnimals(int a, string b) {
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void printAnimals(string a, int b) { #paired
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    cout << a << " " << b;
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    cout << b << " " << a; #paired
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    cout << b << a; #paired
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}
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int main() {
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    printAnimals(2, "elephants");
---
}
        

Finish the code below so that it calculates the common log of a minus the natural log of a and prints the difference. You will need to use cmath functions. Select the Parsonsprob tab for hints for the construction of the code.

#include <iostream> #include <cmath> using namespace std; void logSubtraction (double a) { // Create the variable difference and assign it to the difference mentioned in the instructions cout << difference; } int main () { // DO NOT MODIFY ANYTHING BELOW THIS LINE cout << "Testing with a = 8..." << endl; cout << " Your solution has difference = "; logSubtraction(8); cout << endl; cout << " The correct solution has difference = -1.17635" << endl; cout << "Testing with a = -2..." << endl; cout << " Your solution has difference = "; logSubtraction(-2); cout << endl; cout << " The correct solution has difference = nan"; }

Finish the code below so that it calculates the common log of a minus the natural log of a and prints the difference. You will need to use cmath functions. Use the lines to construct the code, then go back to complete the Activecode tab.

        void logSubtraction (double a) {
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    double difference;
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    int difference; #paired
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    difference = log10(a) - log(a);
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    difference = log(a) - log10(a); #paired
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    cout << difference;
---
}
        

Write a function called intDivision that takes two doubles as parameters and prints the quotient of the integer division of the first number divided by the second. 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 intDivision () { } int main () { // DO NOT MODIFY ANYTHING BELOW THIS LINE cout << "Testing with a = 2.4, b = 6.8..." << endl; cout << " Your solution has a quotient of "; intDivision(2.4, 6.8); cout << endl; cout << " The correct solution has a quotient of 0" << endl; cout << "Testing with a = -8.6, b = 4.2..." << endl; cout << " Your solution has a quotient of "; intDivision(-8.6, 4.2); cout << endl; cout << " The correct solution has a quotient of -2"; }

Write a function called intDivision that takes two doubles as parameters and prints the quotient of the integer division of the first number divided by the second. Use the lines to construct the code, then go back to complete the Activecode tab.

        void intDivision( double a, double b ) {
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void intDivision( int a, int b ) { #paired
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    int difference;
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    double difference; #paired
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    difference = a / b;
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    difference = b / a; #distractor
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    cout << difference << endl;
---
}
        

Write a function called volumePrism that takes three double sidelengths as parameters, and calculates and prints the volume of a the rectangular prism. 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 volumePrism () { } int main () { // DO NOT MODIFY ANYTHING BELOW THIS LINE cout << "Testing with a = 3, b = 4, c = 5..." << endl; cout << " Your solution calculated a volume of "; volumePrism(3,4,5); cout << endl; cout << " The correct solution calculates a volume of 60" << endl; cout << "Testing with a = 5.7, b = 3.9, c = 1.3..." << endl; cout << " Your solution calculated a volume of "; volumePrism(5.7,3.9,1.3); cout << endl; cout << " The correct solution calculates a volume of 28.899"; }

Write a function called volumePrism that takes three double sidelengths as parameters, and calculates and prints the volume of a the rectangular prism. Use the lines to construct the code, then go back to complete the Activecode tab.

        void volumePrism (double s1, double s2, double s3) {
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void volumePrism (int s1, int s2, int s3) { #paired
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    double volume;
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    int volume; #distractor
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    volume = s1 * s2 * s3;
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    cout << volume << endl;
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}
        

Write a function called volumeSphere that takes a double radius as a parameter, and calculates and prints the volume of a sphere with that radius. Use 3.14 for pi. 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 volumeSphere () { } int main() { // DO NOT MODIFY ANYTHING BELOW THIS LINE cout << "Testing with radius = 3..." << endl; cout << " Your solution calculated a volume of "; volumeSphere(3); cout << endl; cout << " The correct solution calculates a volume of 113.04" << endl; cout << "Testing with radius = 3.24..." << endl; cout << " Your solution calculated a volume of "; volumeSphere(3.24); cout << endl; cout << " The correct solution calculates a volume of 142.398"; }

Write a function called volumeSphere that takes a double radius as a parameter, and calculates and prints the volume of a sphere with that radius. Use 3.14 for pi. Use the lines to construct the code, then go back to complete the Activecode tab.

        void volumeSphere(double radius) {
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    double pi = 3.14;
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    double volume;
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    int volume; #paired
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    volume = 4 * pi * radius * radius * radius / 3;
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    volume = 4 / 3 * pi * radius ^ 3; #distractor
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    cout << volume << endl;
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}
        

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