intoduction

Question 1

How would you include a file called MyDeclarations.h?

Answer 1

#include "MyDeclarations.h"

Question 2

How would you include a standard library called iostream?

Answer 2

#include <iostream>

Question 3

How would you include the C header ctype?

Answer 3

#include <cctype>

Add a ‘c’ to the beginning instead of a ‘.h’ at the end like in C

Question 4

Write a simple int main() that sums numbers read from the input.

using namespace std

Answer 4

#include <iostream>
using namespace std;

int main() {
    int sum = 0, value = 0;
    while (cin >> value)
        sum += value;
    cout << "sum: " << sum << endl;
}

Question 5

How could you have the line cout << "Hello, world!" << endl; without having the line using namespace std; prior?

Answer 5

using std::cout;
using std::endl;

these are called “using declarations”

Question 6

Which type of file should never have the line using namespace std;

Answer 6

a header (.h) file