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;
}

In the active code below, the output of this function, if we pass time an argument, is 11:59:3.14159.

#include <iostream> using namespace std; struct Time { int hour, minute; double second; }; void printTime (Time& t) { cout << t.hour << ":" << t.minute << ":" << t.second << endl; } int main () { Time time = { 11, 59, 3.14159 }; printTime(time); }

Q-2: 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++.

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