Two dimensional arrays programs in c

Display diagonal matrix of this matrix on the screen. Find out Transpose of this matrix and display this newly created Transpose matrix on the screen. Find out the Addition of these two matrices. Display Both entered matrix as well the sum of these two matrices on the screen. Find out the subtraction of these two matrices. C programming language allows multidimensional arrays. The simplest form of multidimensional array is the two-dimensional array.

A two-dimensional array is, in essence, a list of one-dimensional arrays. Where type can be any valid C data type and arrayName will be a valid C identifier. A two-dimensional array can be considered as a table which will have x number of rows and y number of columns. Thus, every element in the array a is identified by an element name of the form a[ i ][ j ] , where 'a' is the name of the array, and 'i' and 'j' are the subscripts that uniquely identify each element in 'a'.

Multidimensional arrays may be initialized by specifying bracketed values for each row. Following is an array with 3 rows and each row has 4 columns. The nested braces, which indicate the intended row, are optional.

An element in a two-dimensional array is accessed by using the subscripts, i. The above statement will take the 4th element from the 3rd row of the array. You can verify it in the above figure.

As explained above, you can have arrays with any number of dimensions, although it is likely that most of the arrays you create will be of one or two dimensions. Nested loop is used to enter data in 2-D arrays. It depends upon the programmer which loop he wants to use it could be While loop or it could be a For loop. The outer loop acts as the number of rows of a matrix and the inner loop acts as the number of columns of a matrix.

The 2-D arrays which are declared by the keyword int and able to store integer values are called two dimensional integer arrays. The process of assigning values during declaration is called initialization. TheseArrays can be initialized by putting the curly braces around each row separating by a comma also each element of a matrix should be separated by a comma.

In a main function first of all the two dimensional integer array will be declared by the name of a matrix , then the integer elements will be stored in an array with the help of a nested For loop. Then again with the help of another nested loop the program will print the elements stored in the matrix on a computer screen.

The 2-D arrays which are declared by the keyword char and able to store characters are called two dimensional character arrays. As you can see the above array is declared by a keyword int therefore it is a 2-D character array.

Now consider a following example of a complete program which will elaborate the working of character array. There is nothing new in this previous program that deserves any explanation.

We are just using two nested for loops. The first nested for loop takes input from the user. And the second for loop prints the elements of a 2-D array like a matrix. In such cases, the remaining elements will be given the value of 0. In 2-D arrays, it is optional to specify the first dimension but the second dimension must always be present.

This works only when you are declaring and initializing the array at the same time. For example:. As discussed earlier you can visualize a 2-D array as a matrix. The following program demonstrates the addition of two matrices. Two matrices can be added or subtracted, only if they have the same dimension. The resultant array will be a matrix of the same dimension as the original two.