Matrix operations

Addition of Matrix

    #include<stdio.h>
    #include<conio.h>
     void main()
     {
     int a[3][3],b[3][3],c[3][3],i,j;
    clrscr();
    printf("\nenter elements into frst matrix= ");
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    scanf("%d",&a[i][j]);
    }
    }
    printf("\n enter elements into second matrix=");
    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++)
    {
    c[i][j]=0;
    }
    }
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    c[i][j]=a[i][j]+b[i][j];
    }
    }
    printf("\n addition of two numbers=.........\n");
    for(i=0;i<3;i++)    
    {
    for(j=0;j<3;j++)
    {
    printf("%4d",c[i][j]);
    }
    printf("\n");
    }
    getch();
    }

Output:
Enter elements into first matrix:
1 2 3
4 5 6
7 8 9
Enter elements into second matrix:
9 8 7
6 5 4
3 2 1
Addition of two matrices:
10 10 10
10 10 10
10 10 10

Subtraction of matrices

    #include<stdio.h>
    #include<conio.h>
     void main()
     {
     int a[3][3],b[3][3],c[3][3],i,j;
    clrscr();
    printf("\nenter elements into frst matrix= ");
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    scanf("%d",&a[i][j]);
    }
    }
    printf("\n enter elements into second matrix=");
    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++)
    {
    c[i][j]=0;
    }
    }
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    c[i][j]=a[i][j]-b[i][j];
    }
    }
    printf("\n subtraction of two numbers=.........\n");
    for(i=0;i<3;i++)    
    {
    for(j=0;j<3;j++)
    {
    printf("%4d",c[i][j]);
    }
    printf("\n");
    }
    getch();
    }

Output:
Enter elements into first matrix:
1 2 3
4 5 6
7 8 9
Enter elements into second matrix:
9 8 7
6 5 4
3 2 1
Subtraction of two matrices:
-8 -6 -4
-2 0 2
4 6 8

Multiplication of matrices

    #include<stdio.h>
    #include<conio.h>
     void main()
     {
     int a[3][3],b[3][3],c[3][3],i,j,k;
    clrscr();
    printf("\nenter elements into frst matrix= ");
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    scanf("%d",&a[i][j]);
    }
    }
    printf("\n enter elements into second matrix=");
    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++)
    {
    c[i][j]=0;
    }
    }
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    c[i][j]+=a[i][k]*b[k][j];
    }
    }
    printf("\n multiplication of two numbers=.........\n");
    for(i=0;i<3;i++)    
    {
    for(j=0;j<3;j++)
    {
    printf("%4d",c[i][j]);
    }
    printf("\n");
    }
    getch();
    }

Output:
Enter elements into first matrix:
1 1 1
1 1 1
1 1 1
Enter elements into second matrix:
1 1 1
1 1 1
1 1 1
Multiplication of two matrices:
3 3 3
3 3 3
3 3 3

Transpose of a matrix

             #include<stdio.h>
    #include<conio.h>
     void main()
     {
     int a[3][3],c[3][3],i,j;
    clrscr();
    printf("\nenter elements into frst matrix= ");
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    scanf("%d",&a[i][j]);
    }
    }
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    c[i][j]=0;
    }
    }
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    c[i][j]=a[j][i];
    }
    }
    printf("\n transpose of a matrix=.........\n");
    for(i=0;i<3;i++)    
    {
    for(j=0;j<3;j++)
    {
    printf("%4d",c[i][j]);
    }
    printf("\n");
    }
    getch();
    }

Output:
Enter elements into first matrix:
1 2 3
4 5 6
7 8 9
Transpose of a matrix:
1 4 7
2 5 8
3 6 9

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