Write a parallel program in c for matrix multiplication

 #include <pthread.h>

#include <stdio.h>

#include <stdlib.h>

#define M 3

#define K 2

#define N 3

#define NUM_THREADS 10

int A [M][K] = { {1,4}, {2,5}, {3,6} };

int B [K][N] = { {1,2,3}, {5,4,7} };

int C [M][N];

struct v {

   int i; /* row */

   int j; /* column */

};

void *runner(void *param); /* the thread */

int main(int argc, char *argv[]) {

   int i,j, count = 0;

   for(i = 0; i < M; i++) {

      for(j = 0; j < N; j++) {

         struct v *data = (struct v *) malloc(sizeof(struct v));

         data->i = i;

         data->j = j;

         pthread_t tid;       //Thread ID

         pthread_attr_t attr; //Set of thread attributes

         pthread_attr_init(&attr);

         pthread_create(&tid,&attr,runner,data);

         pthread_join(tid, NULL);

         count++; }

   }

   for(i = 0; i < M; i++) {

      for(j = 0; j < N; j++) {

         printf("%d ", C[i][j]); }

      printf("\n");}

}

void *runner(void *param) {

   struct v *data = param; // the structure that holds our data

   int n, sum = 0; //the counter and sum

   for(n = 0; n< K; n++){

      sum += A[data->i][n] * B[n][data->j];

   }

   C[data->i][data->j] = sum;

   pthread_exit(0);

}