CSSE2310 Lecture 2: Booleans, Vim, and Tic Tac Toe Implementation

Practice flashcards covering C Boolean types, Vim configuration settings for CSSE2310, and implementation details for a Tic Tac Toe program including library headers and array logic.

In the C programming language, how are numerical values interpreted as Boolean values?

A value of $0$ is interpreted as false, while any non-zero value is interpreted as true.

What header file must be included to use the specific $bool$ type in C?

$$stdbool.h$$

Why is $stdbool.h$ required instead of the $bool$ type being a standard, built-in part of the original C language?

The $bool$ type was added to the C language later, and developers had already defined their own Boolean types in the interim.

What is the effect of the pre-increment operator used in the expression $++i$?

It increments the variable $i$ by $1$ ($i = i + 1$) and then returns the new value for use in the expression.

What does the expression $if (x = 7)$ do in C if the programmer intended to check if $x$ equals $7$?

It performs an assignment operation, setting $x$ to $7$, and since the result ($7$) is non-zero, the condition always evaluates to true.

What is the path for the standard Vim configuration file recommended in the course?

$$local/courses/csse2310/resources/vimrc$$

According to the lecture's style guide, what is the maximum number of characters permitted per line?

$80$ characters (with a ruler often set at column $81$).

In the provided Vim configuration, what keyboard shortcut is mapped to reformat code to match the style guide's indentation and spacing?

$$Control+k$$

When passing an array to a function in C, what is actually passed?

A pointer to the first element ($first\,member$) of the array, rather than a copy of the entire array.

If a Tic Tac Toe board is represented by cell numbers $0$ through $8$, what formula converts a cell number to a row number in a $3 \times 3$ grid?

\text{row} = \text{cell_number} / 3

What is the modulo formula for determining the column number from a cell number in a $3 \times 3$ grid?

\text{column} = \text{cell_number} \pmod 3

Which function is used in the lecture to read a string from standard input while specifying a buffer size?

$$fgets()$$

What header file is required to use the $atoi()$ function for converting strings to integers?

$$stdlib.h$$

What is a specific behavior of the $atoi()$ function when it encounters a string that is not a numeric value?

It returns $0$ without performing error checking on the string.

Which header file must be included to use the character check function $isdigit()$?

$$ctype.h$$

How does the $fgets()$ function handle new line characters?

If a new line character is read, it is stored into the buffer.

What header is necessary to use the $strlen()$ function for calculating the length of a string?

$$string.h$$

How does the ternary operator $player == 'x' ? 'o' : 'x'$ function?

It evaluates if the current player is $'x'$; if true, it returns $'o'$; otherwise, it returns $'x'$.