Question

Suppose that "list" is an array of 10 components of type int. Which of the following codes correctly outputs all the elements of "list"?

a. for (int j = 1; j < 10; j++)
cout << list[j]; << " ";
cout << endl;
b. for (int j = 0; j <= 9; j++)
cout << list[j]; << " ";
cout << endl;
c. for (int j = 1; j < 11; j++)
cout << list[j]; << " ";
cout << endl;
d. for (int j = 1; j <= 10; j++)
cout << list[j]; << " ";
cout << endl;

Answer 1

The correct code to output all elements of a 10-component array 'list' in C++ is option b, which uses a for-loop starting at index 0 and goes to index 9, inclusive.

Step-by-step explanation:

The correct code for outputting all the elements of an array called list that has 10 components of type int is option b. This is because array indexing in most programming languages, including C++, starts at 0. So, to access all elements of a 10-component array, you need to run the loop from index 0 to index 9.

The correct code looks like this:

for (int j = 0; j <= 9; j++) cout << list[j] << " "; cout << endl;

This loop starts from 0, which is the first index of the array, and goes up to 9, which is the last index of a 10-element array. It's important to use j <= 9 instead of j < 10 as both are equivalent in this scenario, but the actual array indices are from 0 to 9.