Skip to main content

How To Think Like a Computer Scientist C++ Edition The Pretext Interactive Version

Barbara Ericson, Allen B. Downey, Jason L. Wright (Editor)

Section 9.2 printTime

When we define a new type it is a good idea to write function that displays the instance variables in a human-readable form, which you attempted on the page before. Your solution should have looked something like this.
🔗
void printTime(Time& t) {
  cout << t.hour << ":" << t.minute << ":" << t.second << endl;
}
Listing 9.2.1. In this active code, the output of this function, if we pass time an argument, is 11:59:3.14159.
🔗

Checkpoint 9.2.1.

Which of the following would be a correct way to display the price of an object and finish the printPrice, which we saw on the previous page?
🔗
struct Price {
  int dollar, cents;
};

void printPrice(Price& p) {
  // Implementation here
}

int main() {
  Price sandwich = { 3, 45 };
  Price coffee = { 2, 50 };
  Price pastry = { 2, 0 };
}
  • cout << "Price is " << "p.dollar" << " dollars and" << "p.cents" << "cents." << endl;
    🔗
  • Try again. We want to print the values rather than statements.
  • cout << "Price is " << p.dollar << " dollars and " << p.cents << " cents." << endl;
    🔗
  • Correct!
  • cout << "Price is " << p.dollar << " dollars and " << p.cents << " cents." << endl
    🔗
  • This would not compile. There is an important character that ends nearly all statements in C++.
🔗
You have attempted 1 of 3 activities on this page.
🔗
PrevTopNext