It is regarding how 1 dimension and 2 dimension array work in programming language

1. 2 DIMENSIONAL
ARRAY
GROUP A ‘EVEREST’
Amit Budachhetri
Anil Pokhrel
Ajit Pudasaini
Rikriti Koirala
Roji shrestha
Puja Neupane 1

2. CONTENTS
• Basic array
• Difference between 1D &2D
• 2 Dimension Array
• Syntax of 2 D
• Processing Two-Dimensional Arrays
• Declaration of 2 D
• Examples of 2D
• Conclusion
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3. Array
• Consecutive group of memory location
• All of which have the same type
• We have 1D,2D 3D types of array
• Position number used to refer to a specific
location/element
• Place in square brackets
• Must be positive integer or integer expression
• First element has index zero
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4. Difference between 1D &2D
• 1d array contains single row and multiple
columns
• 2d array contains multiple row and multiple
columns
• 2d array is a collection of 1d array placed one
below
• 1d has only the length, but 2d has both the
length and width
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5. 5

6. 2D Array
• Two-dimensional Array: a collection of a fixed
number of components arranged in two dimensions
• All components are of the same type
• The two expressions row size and column size specify
the number of rows and the number of columns,
respectively, in the array
• Two-dimensional arrays are sometimes called
matrices or tables
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7. Syntax
• The syntax for declaring a two-dimensional
array is:
Data Type Array Name[rowsize][columnsize];
where row size and column size are
expressions yielding positive integer values
Example:int data[3][4];
―Data is a TWO Dimensional array of size 3*4
elements
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8. Lets observe the table:
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9. Processing Two-Dimensional Arrays:
• A two-dimensional array can be processed in
three different ways:
1. Process the entire array
2. Process a particular row of the array, called row
processing
3. Process a particular column of the array, called
column processing
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10. Declaration
• A 2-D array within a function is declared as
follows:
• #define ROW 3
• define COL 5
• ..... what(....)
• {
• int a[ROW][COL] .... ;
• ..........................
• }
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11. 11

12. 1.Program to transpose a matrix.
#include <stdio.h>
#define MAXROW 10
#define MAXCOL 10
int main()
{
int matrix[MAXROW][MAXCOL];
int i,j,r,c;
printf("Enter number of Rows :");
scanf("%d",&r);
printf("Enter number of Cols :");
scanf("%d",&c);
printf("nEnter matrix elements :n");
for(i=0;i< r;i++)
{
for(j=0;j< c;j++) 12

13. {
printf("Enter element [%d,%d] : ",i+1,j+1);
scanf("%d",&matrix[i][j]);
}
}
/*Transpose a matrix */
printf("nTranspose Matrix is :");
for(i=0;i< c;i++)
{
for(j=0;j< r;j++) {
printf("%dt",matrix[j][i]); /*print elements*/
}
printf("n"); /*after each row print new line*/
}
return 0;
} 13

14. OUTPUT
• Enter number of Rows :2
• Enter number of Cols :3
• Enter matrix elements :
• Enter element [1,1] : 1
• Enter element [1,2] : 2
• Enter element [1,3] : 3
• Enter element [2,1] : 4
• Enter element [2,2] : 5
• Enter element [2,3] : 6
• Transpose Matrix is : 1 4
2 5
3 6 14

15. 2.Program to find multiplication table
• #include<stdio.h>
• #define R5
• #define C5 void main()
• {
• int R, C, product[R][C]; int i, j;
printf("multiplication tablenn");
• Printf(“ “)
• for(j=1; j<=C; j++)
• {
• printf("%4d",j);
• printf("n"); 15

16. • printf("__________________________");
• }
• for(i=0; i<R; i++)
• {
• R=i+1;
• printf("%2d",R);
• for(j=1; j<=C; j++)
• {
• C=j;
• product[i][j]=R*C;
• printf("%4d",product[i][j]);
• }
• printf("n");
• } 16

17. OUTPUT
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18. Conclusion
• Two-dimensional array are those type of array, which
has finite number of rows and finite number of
columns
• The rule for giving the array name is same as the
ordinary variable
• The row size and column size should be an individual
constant.
• during declaration the maximum number of rows
and maximum number of column should be specified
for processing all array elements 18

19. Reference
• Google.com
• E.Balaguruswamy- Programming in ANSI
• Teacher’s notes (MR.LOK PRAKASH
PANDEY)
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