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| <pre>/* Program to implement matrix multiplication. */
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| /* Performed by Milan. */
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| #include <stdio.h>
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| #include <conio.h>
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|
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| void main()
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| {
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| int a[10][10], b[10][10], c[10][10];
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| int i, j, m, n, x, y, k;
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| clrscr();
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|
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| /* Entering values for matrix a...*/
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| printf ("\n Enter the rows and columns of a: ");
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| scanf ("%d%d", &m, &n);
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|
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| for (i = 0; i < m; i++)
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| {
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| for (j = 0; j < n; j++)
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| {
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| printf (" a[%d][%d] = ", (i+1), (j+1));
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| scanf ("%d", &a[i][j]);
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| }
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| printf ("\n");
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| }
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|
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| /* Entering values for matrix b... */
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| printf ("\n Enter the rows and columns of b: ");
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| scanf ("%d%d", &x, &y);
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|
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| for (i = 0; i < x; i++)
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| {
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| for (j = 0; j < y; j++)
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| {
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| printf (" b[%d][%d] = ", (i+1), (j+1));
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| scanf ("%d", &b[i][j]);
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| }
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| printf ("\n");
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| }
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|
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| /* Calculations */
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| if ( n != x)
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| {
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| printf ("\n Error!! Rows of a don't match with columns of b.");
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| printf ("\n Multiplication Impossible.");
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| getch();
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| exit(0);
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| }
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| else
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| {
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| for (i = 0; i < m; i++)
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| {
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| for (j = 0; j < y; j++)
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| {
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| c[i][j] = 0;
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| for (k = 0; k < n; k++)
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| {
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| c[i][j]+=a[i][k]*b[k][j];
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| }
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| }
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| }
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| }
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|
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| /* Output */
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| printf ("\n The resultant c is:\n");
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| for (i = 0; i < m; i++)
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| {
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| for (j = 0; j < y; j++)
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| {
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| printf (" c[%d][%d] = %d", (i+1), (j+1), c[i][j]);
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| }
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| printf ("\n");
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| }
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|
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| getch();
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| }
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| /* Output:
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|
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| Enter the rows and columns of a: 2 2
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| a[1][1] = 1
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| a[1][2] = 2
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|
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| a[2][1] = 3
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| a[2][2] = 4
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|
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|
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| Enter the rows and columns of b: 2 2
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| b[1][1] = 2
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| b[1][2] = 1
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|
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| b[2][1] = 2
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| b[2][2] = 2
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|
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|
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| The resultant c is:
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| c[1][1] = 6 c[1][2] = 5
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| c[2][1] = 14 c[2][2] = 11
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| */
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| </pre>
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|
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| [[Category:C source code examples]]
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