C Language Tutorials by Ghulam Murtaza Dahar - HTML preview

Output

Enter number of students: 3

Enter marks of student1: 12

Enter marks of student2: 31

Enter marks of student3: 2

sum=45

Important thing to remember in C arrays

Suppose, you declared the array of 10 students. For example: arr[10]. You can use array members from arr[0] to arr[9]. But, what if you want to use element arr[10], arr[13] etc. Compiler may not show error using these elements but, may cause fatal error during program execution.

C Programming Multidimensional Arrays

C programming language allows to create arrays of arrays known as multidimensional arrays. For example:

float a[2][6];

Here, a is an array of two dimension, which is an example of multidimensional array. This array has 2 rows and 6 columns

For better understanding of multidimensional arrays, array elements of above example can be thinked of as below:

Initialization of Multidimensional Arrays

In C, multidimensional arrays can be initialized in different number of ways.

int c[2][3]={{1,3,0}, {-1,5,9}};

OR

int c[][3]={{1,3,0}, {-1,5,9}};

OR

int c[2][3]={1,3,0,-1,5,9};

Initialization Of three-dimensional Array

double cprogram[3][2][4]={

{{-0.1, 0.22, 0.3, 4.3}, {2.3, 4.7, -0.9, 2}},

{{0.9, 3.6, 4.5, 4}, {1.2, 2.4, 0.22, -1}},

{{8.2, 3.12, 34.2, 0.1}, {2.1, 3.2, 4.3, -2.0}}

};

Suppose there is a multidimensional array arr[i][j][k][m]. Then this array can hold i*j*k*m numbers of data.

Similarly, the array of any dimension can be initialized in C programming.

Example of Multidimensional Array In C

Write a C program to find sum of two matrix of order 2*2 using multidimensional arrays where, elements of matrix are