Mixed-Up Code Exercises

Answer the following Mixed-Up Code questions to assess what you have learned in this chapter.

Construct a function that correctly prints the integer conversion of the passed double.

        void printInteger (double d) {
---
printInteger (double d); #paired
---
 d = int(d);
---
 d = integer(d); #paired
---
 cout << d;
---
 cout d; #paired
---
}
        

Construct a function called newLine that takes no arguments and prints a blank line. Then construct another function called divider that prints two blank lines separated by a line of “… … … …”

        void newLine () {
---
 cout << endl;
---
}  //newLine
---
void divider () {
---
 void divider (newLine) { #paired
---
 newLine ();  //first call
---
 cout << newLine ();  //first call #paired
---
 cout << ". . . . . . . . . . . . " << endl;
---
 newline ();  //second call
---
 cout << newLine ();  //second call #paired
---
}  //divider
        

Construct a function that correctly calculates the volume of a cone with as much precision as possible and prints the value to the terminal. Use 3.14 for pi.

        void volumeCone (double r, double h) {
---
double volumeCone (double r, double h) { #paired
---
 double vol = 1/3.0 * 3.14 * r * r * h;
---
 double vol = 1/3 * 3.14 * r * r * h; #paired
---
 int vol = 1/3 * 3.14 * r * r * h; #paired
---
 int vol = 1/3.0 * 3.14 * r * r * h; #paired
---
 cout << vol;
---
}
        

Construct a function that prints the sin of an angle given in degrees. Use 3.14 for pi.

        #include <cmath>
---
#include <iostream>
using namespace std;
---
void sineDegrees (double d) {
---
void sineDegrees () { #paired
---
 double r = d * (2 * 3.14) / 360.0;
---
 double r = d * 360.0 / (2 * 3.14); #paired
---
 double sine = sin(r);
---
 double sine = sin(d); #paired
---
 cout << sine;
---
}
---
 #include <math> #distractor
        

Construct a function that prints the price (with 8% sales tax) of an item with after using a 30% off coupon.

        void finalPrice (double item) {
---
void finalPrice (string item) { #paired
---
 double discount = item * 0.30;
---
 double final = (item - discount) * 1.08;
---
 double final = (item - discount) * 0.08; #paired
---
 double final = item - discount * 0.08; #paired
---
 cout << final;
---
}
        

Suppose you have already defined a function called sumOfSquares which returns the sum of the squares of two numbers and root which returns the square root of a number. Construct a function that calculates the hypotenuse of the right triangle and prints the three sidelengths.

        int main () {
---
 double s1 = 4.8;
 double s2 = 3.8;
---
 int s1 = 4.8; #paired
 int s2 = 3.6;
---
 double sqSum = sumOfSquares(s2, s1);
---
 sqSum = sumOfSquares(s1, s2); #paired
---
 double hyp = root(sqSum);
---
 double hyp = root(s1, s2); #paired
---
 cout << "The sides of the triangle are: " << s1 << ", " << s2 << ", " << hyp;
---
 cout << "The sides of the triangle are: " << s1 << ", " << s2 << ", " << s3; #paired
---
}
        

The chickens from the previous chapter are infuriated. Construct a function that prints “Eat” on the first line, “More” on the second line, and the name of the passed animal on the fourth line, followed by an exclamation point.

        void eatMore (string animal) {
---
void eatMore () { #paired
---
 cout << "Eat";
---
 cout << "Eat" << endl; #paired
---
 cout << endl; cout << "More" << endl;
---
 cout << endl;
---
 cout << animal << "!" << endl;
---
 cout << animal << ! << endl; #paired
---
}
        

Construct a function that takes a dollar amount and cent amount and prints the total amount of money that you have. Hint: the mod operator ‘%’ returns the remainder of a division.

        void printAmount (int dollars, int cents) {
---
 int dollarTotal = dollars + cents / 100;
---
 double dollarTotal = dollars + cents / 100.0; #paired
---
 double centTotal = cents % 100;
---
 double centTotal = cents / 100; #paired
---
 cout << "$" << dollarTotal << "." << centTotal;
---
 cout << "$" << dollarTotal << centTotal; #paired
---
}
        

In Michigan, the probability that it snows on any given day in the winter is about 14%. The probability of having a snow day on any given day in the winter is about 4%. The probability that is snows and you have a snow day is 8%. Construct and call a function that calculates the probability of a having a snow day, given the fact that it will snow tonight. For reference, the formula for conditional probability is: P(A|B) = P(B and A) / P(B).

        void conditionalProb (double B, double both) {
---
void conditionalProb (double B, both) { #paired
---
 double prob = both / B;
---
 double prob = B / both; #paired
---
 cout << prob;
---
} //conditionalProb
---
int main () {
---
 double pSnow = 0.14;
 double pSnowday = 0.04;
 double pBoth = 0.08;
---
 conditionalProb(pSnow, pBoth);
---
 conditionalProb(pSnowday, pBoth); #paired
---
 conditionalProb(pSnowday, pSnow); #paired
---
} //main
        

Your final grade is determined by a midterm component (each midterm is worth 20% of the grade) and a final component. In order to avoid any discrepancies with students who’s grades are on the fence, your teacher follows this strict grading scale: [0%,60%) = F, [60%, 70%) = D, [70%, 80%) = C, [80%, 90%) = B and [90%, 100%] = A. He does not round until the very end. Construct a function that determines a student’s final grade percentage according to this grading scheme and prints the result.

        void finalGrade (double m1, double m2, double f) {
---
void finalGrade (double m1, m2, f) { #paired
---
 double m_comp = m1 * 0.2 + m2 * 0.2;
 double f_comp = f * 0.06;
---
 int m_comp = m1 * 0.2 + m2 * 0.2; #paired
 int f_comp = f * 0.06;
---
 double final_grade = m_comp + f_comp;
---
 cout << int(final_grade);
---
 cout << int(final_grade) + 1; #paired
---
 cout << final_grade; #paired
---
}
        

You have attempted of activities on this page