C programming for addition, subtraction, multiplication of matrices

/*Addition and subtraction of matrices */

#include<stdio.h>

void

 main()

{

                int i,j,m,n,a[20][20],b[20][20],c[20][20],d[20][20];

                printf("Enter the order of matrices:");

                scanf("%d  %d",&m,&n);

                printf("Enter the element of matrix A:");

                for(i=0;i<m;i++)

                {

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

                                                scanf("%d",&a[i][j]);

                                printf("\n");

                }

                printf("the input matrix A is:\n");

                for(i=0;i<m;i++)

                {

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

                                                printf("%d\t",a[i][j]);

                                printf("\n");

                }

                                printf("Enter the element of matrix B:");

                for(i=0;i<m;i++)

                {

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

                                                scanf("%d",&b[i][j]);

                                printf("\n");

                }

                printf("the input matrix B is:\n");

                for(i=0;i<m;i++)

                {

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

                                                printf("%d\t",b[i][j]);

                                printf("\n");

                }

                /*matrix addition*/

                for(i=0;i<m;i++)

                {

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

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

                }

                printf("the summation matrix is:\n");

                for(i=0;i<m;i++)

                {

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

                                                printf("%d\t",c[i][j]);

                                printf("\n");

                }

                /*matrix subtraction*/

                for(i=0;i<m;i++)

                {

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

                                                d[i][j]=a[i][j]-b[i][j];

                }

                printf("the summation matrix is:\n");

                for(i=0;i<m;i++)

                {

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

                                                printf("%d\t",d[i][j]);

                                printf("\n");

                }

}

RESULT:

Enter the order of matrices:3 3

Enter the element of matrix A:1 2 3 4 5 6 7 8 9

the input matrix A is:

1       2       3

4       5       6

7       8       9

Enter the element of matrix B:12

4 56 11 7 45 0 4 6

the input matrix B is:

12      4       56

11      7       45

0       4       6

the summation matrix is:

13      6       59

15      12      51

7       12      15

the summation matrix is:

-11     -2      -53

-7      -2      -39

7       4       3

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/*multiplication of matrices*/

#include<stdio.h>

void

 main()

{

                int i,j,m,n,p,k,a[20][20],b[20][20],c[20][20];

                printf("Enter the order of matrix A:");

                scanf("%d  %d",&m,&n);

                printf("Enter the order of matrix B:");

                scanf("%d  %d",&n,&p);

                printf("Enter the element of matrix A:");

                for(i=0;i<m;i++)

                {

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

                                                scanf("%d",&a[i][j]);

                                printf("\n");

                }

                printf("the input matrix A is:\n");

                for(i=0;i<m;i++)

                {

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

                                                printf("%d\t",a[i][j]);

                                printf("\n");

                }

                printf("Enter the element of matrix B:");

                for(i=0;i<n;i++)

                {

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

                                                scanf("%d",&b[i][j]);

                                printf("\n");

                }

                printf("the input matrix B is:\n");

                for(i=0;i<n;i++)

                {

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

                                                printf("%d\t",b[i][j]);

                                printf("\n");

                }

                /*matrix multiplication*/

                for(i=0;i<m;i++)

                {

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

                                {

                                                c[i][j]=0;

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

                                                {

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

                                                }

                                }

                }

                printf("the multiplication matrix is :\n");

                for(i=0;i<m;i++)

                {

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

                                                printf("%d\t",c[i][j]);

                                printf("\n");

                }

}

RESULT:

Enter the order of matrix A:3 2

Enter the order of matrix B:2 3

Enter the element of matrix A:1 2 3 4 5 6

the input matrix A is:

1       2

3       4

5       6

Enter the element of matrix B:45 65 33 11 0 5

the input matrix B is:

45      65      33

11      0       5

the multiplication matrix is :

67      65      43

179     195     119

291     325     195

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