authParallelAndDistributedSystemsCourseExercise2/dev/points_read_malloc.c

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#define	NUMBER_OF_ROWS		10
#define	NUMBER_OF_COLUMNS	10

int readArrayFromFile(int rows, int columns, double array[rows][columns]);
void printPointsArray(int rows, int columns, double array[rows][columns]);
void init(int pointsArrayRows, int pointsArrayColumns, double pointsArray[pointsArrayRows][pointsArrayColumns]);

int main(int argc, char const *argv[]){
	double **pointsArray;
	int row;

	pointsArray = (double **)(malloc(NUMBER_OF_ROWS * sizeof(double *)));
	for (int i = 0; i < NUMBER_OF_ROWS; ++i){
		pointsArray[i] = (double *)(malloc(NUMBER_OF_COLUMNS * sizeof(double)));
	}
	
	init(NUMBER_OF_ROWS, NUMBER_OF_COLUMNS, &pointsArray);
	printPointsArray(NUMBER_OF_ROWS, NUMBER_OF_COLUMNS, &pointsArray);
	
	printf("Done! Press any key to exit.\n");
	scanf("%d", &row);
}

int readArrayFromFile(int rows, int columns, double array[rows][columns]){
	FILE *pointsBinaryFile;
	pointsBinaryFile = fopen("data.bin","rb");
	
	if(fread(array, sizeof(double), rows * columns, pointsBinaryFile) != rows * columns) {
		if(feof(pointsBinaryFile))
			printf("There were usefull info after the end of file.\n");
		else
			printf("File read error.\n");
		return 1;
	}
	fclose(pointsBinaryFile);
	
	return 0;
}

void printPointsArray(int rows, int columns, double array[rows][columns]){
	int row, column;
	
	for (row=0; row<rows; ++row){
		for (column=0; column<columns; ++column){
			printf("pointsArray[%d][%d] = %f\n", row, column, array[row][column]);
		}
	}
}

void init(int pointsArrayRows, int pointsArrayColumns, double pointsArray[pointsArrayRows][pointsArrayColumns]){
	int row, column;
	
	if (readArrayFromFile(pointsArrayRows, pointsArrayColumns, pointsArray)){
		printf("Failed... Press any key to exit.\n");
		scanf("%d", &row);
		exit(1);
	}
}