Compute the Product of Matrices - C Array

C examples for Array:Multidimensional Arrays

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Description

Compute the Product of Matrices

Demo Code

#include <stdio.h>

void input(int mat[][8], int, int);
void output(int mat[][8], int, int);
void product(int matA[][8], int matB[][8], int matC[][8], int, int, int);

int main()/*from   www .java 2 s.com*/
{
    int rowA = 5, colA = 5, rowB, colB = 6;
    int matA[8][8], matB[8][8], matC[8][8];

    printf("This program performs product of matrices A and B (A x B).\n");
    rowB = colA;

    printf("\nEnter data for matrix A :\n");
    input(matA, rowA, colA);
    printf("\n");
    printf("Matrix A: \n");
    output(matA, rowA, colA);
    printf("\n");

    printf("\nEnter data for matrix B :\n");
    input(matB, rowB, colB);
    printf("\n");
    printf("Matrix B: \n");
    output(matB, rowB, colB);
    printf("\n");

    product(matA, matB, matC, rowA, colA, colB);
    printf("Matrix C (matrix A x matrix B = matrix C) : \n");
    output(matC, rowA, colB);

    printf("\nThank you.\n");
    return 0;
}

void input(int mat[][8], int row, int col)
{
    int i, j;
    for (i = 0; i < row; i++)
    {
      printf("Enter %d values for row no. %d : ", col, i);
        for (j = 0; j < col; j++)
            scanf("%d", &mat[i][j]);
    }
}

void output(int mat[][8], int row, int col)
{
    int i, j;
    for (i = 0; i < row; i++)
    {
      for (j = 0; j < col; j++)
        {
           printf("%d\t", mat[i][j]);
        }
        printf("\n");
    }
}

void product(int matA[][8], int matB[][8],
int matC[][8], int m1, int n1, int n2)
{
    int i, j, t;
    for (i = 0; i < m1; i++){
      for (j = 0; j < n2; j++){
            matC[i][j] = 0;
            for (t = 0; t < n1; t++){
               matC[i][j] += matA[i][t] * matB[t][j];
            }
      }
    }
}

Result


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