Examples of Multi-dimensional arrays in C programming

/* Program to read & display 2×3 matrix */

#include<stdio.h>

#include<conio.h>

void main( )

{

int matrix [2] [3], i, j ;

clrscr( ) ;

for (i=0 ; i<2 ; i++)

{         

for (j = 0 ; j<3 ; j++)

{

printf(“Enter matrix [%d] [%d] : \t”, i, j) ;

scanf(“%d”, &matrix [i] [j] ) ;

}

}

printf (“\n Entered matrix is : \n”) ;

for (i=0 ; i<2 ; i++)

{

printf(“%d\t”, matrix [i] [j]) ;

printf(“\n”) ;

}

getch( )

}

Output:

Enter matrix [0] [0] : u1

Enter matrix [0] [1] : u2

Enter matrix [0] [2] : u3

Enter matrix [1] [0] : u4

Enter matrix [1] [1] : u5

Enter matrix [1] [2] : u6

Entered matrix is

1          2          3

4          5          6

/* Program to read two matrices and display their sum */

#include<stdio.h>

#include<conio.h>

main( )

{

int a[3] [3], b[3] [3], s[3] [3], i, j ;

clrscr( ) ;

printf(“Enter first matrix : \n”) ;

for (i=0 ; i<3 ; i++)

for (j=0 ; j<3 ; j++)

scanf(“%d”, &a[i] [j]) ;

printf(“Enter second matrix : \n”) ;

for (i=0 ; i<3 ; i++)

for (j=0 ; j<3 ; j++)

scanf(“%d”, &b[i] [j]) ;

for (i=0 ; i<3 ; i++)

for (j=0 ; j<3 ; j++)

s[i] [j] = a[i] [j] + b[i] [j] ;

printf(“\n The sum matrix is : \n”) ;

for (i=0 ; i<3, i++)

{

 for(j=0 ; j<3 ; j++)

{

printf(“\t%d”, s[i] [j]) ;

}

}

getch( ) ;

}

Output:

Enter first matrix:

1          2         3

4          5          6

7          8          9

Enter second matrix:

9          8         7

6          5          4

3          2         1

The sum matrix is

10        10       10

10        10       10

10         10       10

/* Program to read two matrices and multiply them if possible */

#include<stdio.h>

#include<conio.h>

main( )

{

int a[10] [10], b[10] [10], s[10] [10] ;

int m, n, l, p, i, j, k ;

 printf(“Enter row of first matrix(<=10) : \t”) ;

scanf(“%d”, &m) ;

printf(“Enter column of first matrix(<=10) : \t”) ;

scanf(“%d”, &n) ;

printf(“Enter row of second matrix(<=10) : \t”) ;

scanf(“%d”, &l) ;

printf(“Enter column of second matrix(<=10) : \t”) ;

scanf(“%d”, &p) ;

if (n!=l)

printf(“Multiplication is not possible :”) ;

else

{

printf(“Enter the first matrix : \n”) ;

for (i=0 ; i<=m-1 ; i++)

{

for (j=0 ; j<=n-1 ; j++)

{

printf(“Enter a[%d] [%d] : \t”, i, j) ;

scanf (“%d”, &a [i] [j] ;

}

}

printf(“Enter the second matrix : \n”) ;

for (i=0 ; i<=l-1 ; i++)

{

for (j=0 ; j<=p-1 ; j++)

{

printf (“Enter b[%d] [%d] :\t”, i, j) ;

scanf(“%d”, &b[i] [j] );

}

}

for (i=0 ; i<=m-1 ; i++)

for (j=0 ; j<=p-1 ; j++)

s[i] [j] = 0 ;

for (i=0 ; i<=m-1 ; i++)

for (j=0 ; j<=p-1 ; j++)

for (k=0 ; k<=n-1 ; k++)

s[i] [j] = s[i] [j] + a[i] [k] * b[k] [j] ;

printf (“The matrix multiplication is : \n”) ;

for (i=0 ; i<=m-1 ; i++)

{

for (j=0 ; j<=p-1 ; j++)

{

printf(“%d\t”, s[i] [j],

}

printf(“\n”) ;

}

} /* end of else */

getch( ) ;

} /* end of main( ) */

Output:

Enter row of the first matrix (<=10) : 2

Enter column of the first matix (<=10) : 1

Enter row of the second matrix (<=10) : 1

Enter column of the second matrix (<=10) : 2

Enter the first matrix:

Enter a[0] [0] : 2

Enter a[1] [0] : 2

Enter the second matrix:

Enter b[0] [0] : 3

Enter b[0] [1] : 3

The matrix multiplication is :

6          6

6          6