Typedef keyword in C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a new type name for int.

C

typedef [1] MyInt;

Drag options to blanks, or click blank then click option'

Ainteger

Bint

Cfloat

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'integer' instead of 'int' which is not a valid C type.

Confusing 'float' or 'char' with integer type.

The typedef keyword creates a new name for an existing type. Here, int is the original type.

2fill in blank

medium

Complete the code to create a new type name for a struct.

C

typedef struct [1] {
    int x;
    int y;
} Point;

Drag options to blanks, or click blank then click option'

APoint

Bpoint

CCoordinates

DCoord

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different name than the struct tag name.

Confusing the new type name with the struct tag.

The struct tag name is Point, which is used before the braces.

3fill in blank

hard

Fix the error in the typedef declaration for a pointer type.

C

typedef [1]* IntPtr;

Drag options to blanks, or click blank then click option'

Aint*

BInt

Cint

Dpointer

Attempts:

3 left

💡 Hint

Common Mistakes

Including the asterisk inside the blank causing syntax errors.

Using undefined types like 'Int' or 'pointer'.

The correct way is to write typedef int* IntPtr; but the blank should only contain the base type int. The asterisk is outside the blank.

4fill in blank

hard

Fill both blanks to create a typedef for an array of 10 floats.

C

typedef [1] [2][10];

Drag options to blanks, or click blank then click option'

Afloat

Bint

CMyArray

DArray

Attempts:

3 left

💡 Hint

Common Mistakes

Using int instead of float for the array type.

Confusing the new type name with the base type.

The base type is float and the new type name is MyArray.

5fill in blank

hard

Fill all three blanks to create a typedef for a function pointer that takes two ints and returns an int.

C

typedef [1] (*[2])([3], int);

Drag options to blanks, or click blank then click option'

Aint

BFuncPtr

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Using void as return type instead of int.

Confusing parameter types or missing the pointer syntax.

The return type is int, the new type name is FuncPtr, and the first parameter type is int.