C Language

What information would an error message probably not supply.

• A corrected line of code.

• The line number of the error.

• The file the error occured in.

• A description of the error.

Given a code file calld main.c, which command would compile the code into an executable named main.

• gcc main.c main

• gcc main.c

• gcc main.c -o main

• gcc main -o main.c

Which of the following is a valid declaration for a variable in C?

• int 1example;

• int example value;

• int example;

• int goto;

True or False: variables in C can be initialized with values only at their declaration.

• True, variables must be set at declaration and can not be changed after that.

• False, variables in C can also have their values updated later in the code.

What value would be outputted for x in the printf() statement after casting to it in the below code?
int x = 5;
double y = 32.23;
x = (int)y;
printf("x is now: %d", x);

• Will error, you can not cast a double to an int

• 32

• You can not cast a double to an int without rounding it to a whole number first.

• 5

Fill in the blank below

The main data types in C are: int, float, double, and ___________ .

The main data types in C are:

• integer, decimal, and letter.

• int, float, double and char

• if, else, do, while, break, continue

• int, str, def, switch, if

Fill in the code bellow to use explicit casting.

int x = 1;
char y = 'c';
x = ____________ y;

When can variables in C have their values set?

• Only at declaration.

• At declaration or later in the code.

• Only after declaration.

• They cannot be updated.

True or False: The main data types in C are: int, float, double, and char.

• False, missing is const

• True