16 Questions
What is the main topic of the document?
Multidimensional arrays in C language
What is the purpose of the square brackets in an array declaration?
To denote the size of one dimension
How many pairs of square brackets are needed to declare a three-dimensional array?
3
What is the purpose of the index value in accessing a multidimensional array?
To access an element in the array
What is the syntax to declare a two-dimensional array with 3x3 elements of type char?
char myTab[3][3];
Can a multidimensional array be declared and initialized with values at once?
Yes
What is the purpose of the #define directive in the example code?
To define a constant variable
How many elements are in the two-dimensional array myTab, as declared in the example code?
9
What is the significance of the number of square bracket pairs in a multidimensional array declaration?
It equals the number of dimensions in the array.
What is a characteristic of a multidimensional array declaration in C?
It can be declared and initialized with values at once.
What is necessary to access an element in a multidimensional array?
The index value for every dimension is required.
What is the purpose of the #define directive in the example code?
It defines a constant variable.
What is the result of omitting the internal pairs of curly brackets in a multidimensional array initialization?
It has no effect on the array initialization.
What is true about the myFractions array?
It is a two-dimensional array of real numbers.
What is the significance of the char myTab; declaration?
It declares a two-dimensional array of characters.
What is the purpose of the array indices in a multidimensional array?
To access a specific element in the array.
Study Notes
Multidimensional Arrays in C
- Multidimensional arrays in C language can be considered a complimentary extension to one-dimensional arrays.
- A multidimensional array declaration in C consists of the type of its elements, name of the array, and the array size enclosed in square brackets.
- The number of square bracket pairs in a multidimensional array declaration is equal to the number of dimensions in the array.
- Multidimensional arrays can be declared and initialized with values at once.
- Arrays can be created both as local or global variables.
- A constant variable can be defined using the
#definedirective, e.g.,#define N 10.
Declaring Multidimensional Arrays
- A two-dimensional array with 9 elements (3x3) of type char can be declared as
char myTab[3][3];. - A two-dimensional array with N×N elements of real numbers can be declared as
double myFractions[N][N];. - A three-dimensional array can be declared as
long myCube[3][3][3];. - A multidimensional array can be initialized with values at once, e.g.,
int myMatrix[] = {{1,2,3},{4,5,6},{7,8,9}};.
Accessing Multidimensional Arrays
- To access an element in a multidimensional array, the index value for every dimension needs to be provided.
- In C language, the index values are denoted in subsequent pairs of square brackets, each for one dimension.
- For example, to access an element in a two-dimensional array, you would use
array_name[index1][index2].
Multidimensional Arrays in C
- Multidimensional arrays in C language can be considered a complimentary extension to one-dimensional arrays.
- A multidimensional array declaration in C consists of the type of its elements, name of the array, and the array size enclosed in square brackets.
- The number of square bracket pairs in a multidimensional array declaration is equal to the number of dimensions in the array.
- Multidimensional arrays can be declared and initialized with values at once.
- Arrays can be created both as local or global variables.
- A constant variable can be defined using the
#definedirective, e.g.,#define N 10.
Declaring Multidimensional Arrays
- A two-dimensional array with 9 elements (3x3) of type char can be declared as
char myTab[3][3];. - A two-dimensional array with N×N elements of real numbers can be declared as
double myFractions[N][N];. - A three-dimensional array can be declared as
long myCube[3][3][3];. - A multidimensional array can be initialized with values at once, e.g.,
int myMatrix[] = {{1,2,3},{4,5,6},{7,8,9}};.
Accessing Multidimensional Arrays
- To access an element in a multidimensional array, the index value for every dimension needs to be provided.
- In C language, the index values are denoted in subsequent pairs of square brackets, each for one dimension.
- For example, to access an element in a two-dimensional array, you would use
array_name[index1][index2].
Learn about multidimensional arrays in C language, a continuation of one-dimensional arrays, covering creation and usage.
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