asasas, C (gcc) - rextester

asasas

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <pthread.h>

int a[18][16]; //first array 
int b[16][18]; //second array

struct thread_info {
int arow, bcol; // The matries a and b
int c[18][18]; // The result: c = a*b
};

typedef struct thread_info thread_info_arr;

void *func(void *arg)
{
   thread_info_arr *info;
   int k, arow, bcol, sum=0;
   int c[18][18];
    
   
   info = (thread_info_arr *)arg;
   arow = info->arow;
   bcol = info->bcol;
    
    for(k=0; k <16;k++){
    sum = sum + a[arow][k]*b[k][bcol];
    }
    c[arow][bcol]= sum;
    sum=0;

info->c[arow][bcol] = c[arow][bcol];

pthread_exit(NULL);
   
}

int main(void)
{
   pthread_t thread[324];
    
   thread_info_arr info[324];
  
   int i,k,j,z=0;
  // int a[18][16];
   //int b[16][18];

//Initialize A
    for(i = 0; i < 18; i++){
        for(k = 0; k < 16; k++){
        a[i][k] = (i+1)+(k+1);
        }
    }
    
    //Initialize B
    for(k = 0; k < 16; k++){
        for(j = 0; j < 18; j++){
        b[k][j] = (k+1)+(2*(j+1));
        }
    }

for(i=0; i<18; i++){
        for(j=0; j<18; j++){
            info[z].arow=i;
            info[z].bcol=j;            
            if (pthread_create(&thread[z], NULL, &func, &info[z]) != 0) {
            printf("Error in creating thread\n");
            exit(1);
            z = z+1;
       }
       }
   }

for(z=0; z<324;z++){
   pthread_join(thread[z], NULL);
    }
   //printf("Exec time for thread1 = %lf sec\n", info1.exec_time);

//printf("%d %d",a[0][0],b[0][0]);
   pthread_exit(NULL);
   //main(); pointlessly trying to cycle. 
}


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