Stuff

#include <stdio.h>#include <string.h>#include <stdlib.h>#include <mpi.h>#define MASTER 0#define IS_MASTER my_id==0typedef struct {	int cols;	int rows;	float *data;} MATRIX;MATRIX create_matrix(int rows, int cols) {	MATRIX m;	m.rows = rows;	m.cols = cols;	m.data = ( float * ) malloc( sizeof( float ) * rows * cols );	return m;}void read_matrix( char *path, MATRIX *mat ) {	int i, j;	char aux_string[50];	char rows_string[10], cols_string[10];	FILE *input_file = fopen( path, "r" );	fgets( aux_string, 50, input_file );	printf( "Leyendo la matriz: %s", aux_string );	fgets( aux_string, 50, input_file );	sscanf( aux_string, "%s %s", rows_string, cols_string );	printf( "dimensiones: %s x %s\n\n", rows_string, cols_string );	*mat = create_matrix( atoi( rows_string ), atoi( cols_string ) );	for( i = 0; i < mat->rows; i++ )		for( j = 0; j < mat->cols; j++ )			fscanf( input_file, "%f", &mat->data[i * mat->cols + j] );	}void broadcast_matrix(MATRIX *m, int my_id) {	int rows, cols;	rows = m->rows;	cols = m->cols;	MPI_Bcast( &rows, 1, MPI_INT, MASTER, MPI_COMM_WORLD );	MPI_Bcast( &cols, 1, MPI_INT, MASTER, MPI_COMM_WORLD );		if(IS_MASTER)		MPI_Bcast( m->data, rows * cols, MPI_FLOAT, MASTER, MPI_COMM_WORLD );	else {		*m = create_matrix( rows, cols );		MPI_Bcast( m->data, rows * cols, MPI_FLOAT, MASTER, MPI_COMM_WORLD );	}}int main( int argc, char *argv[] ) {	MATRIX mat1, mat2;	MPI_Status status;	int total_procs, my_id;	int i, j;	/*	if(argc != 3) {		printf("Uso del programa: nombre_del_ejecutable 1ra_matriz 2da_matriz\n");		return 1;	}*/		MPI_Init( &argc, &argv );	MPI_Comm_size( MPI_COMM_WORLD, &total_procs );	MPI_Comm_rank( MPI_COMM_WORLD, &my_id );	if(IS_MASTER) {		read_matrix( "mat1", &mat1 );		read_matrix( "mat2", &mat2 );		// SHOW LA 1ra MATRIZ 		for(i = 0; i < mat1.rows; i++) {			for(j = 0; j < mat1.cols; j++)				printf("%f ", mat1.data[i * mat1.cols + j]);			printf("\n");		}		printf("\n");		// SHOW LA 2da MATRIZ		for(i = 0; i < mat2.rows; i++) {			for(j = 0; j < mat2.cols; j++)				printf("%f ", mat2.data[i * mat2.cols + j]);			printf("\n");		}	}	broadcast_matrix( &mat2, my_id );		MPI_Finalize();	return 0;}