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

void writeTotxt(int rows, int columns, double array[rows][columns], char *filename,
	int commaSeperated, int tabSeperated);

int main(int argc, char const *argv[]){
	double **pointsArray;
	char binaryFilename[200], textFilename[200];
	int commaSeperated = 0, tabSeperated = 0;
	int seperationMethod, numberOfRows, numberOfColumns;

	printf("Seperate values with:\n\t[0] Space (default)\n\t[1] Comma\n\t[2] Tab\nInput = ");
	scanf("%d", &seperationMethod);
	switch(seperationMethod){
		case 1 :
		commaSeperated = 1;
		break;

		case 2 :
		tabSeperated = 1;
		break;
	}

	printf("\nArray rows = ");
	scanf("%d", &numberOfRows);
	printf("\nArray columns = ");
	scanf("%d", &numberOfColumns);

	pointsArray = (double **)(malloc(numberOfRows * sizeof(double *)));
	for (int i = 0; i < numberOfRows; ++i){
		pointsArray[i] = (double *)(malloc(numberOfColumns * sizeof(double)));
	}
	
	printf("\nBinary filename = ");
	scanf("%s", binaryFilename);
	printf("\nText filename = ");
	scanf("%s", textFilename);

	FILE *pointsBinaryFile;
	pointsBinaryFile = fopen(binaryFilename,"rb");
	
	if(fread(&pointsArray, sizeof(double), numberOfRows * numberOfColumns,
		pointsBinaryFile) != numberOfRows * numberOfColumns) {
		if(feof(pointsBinaryFile))
			printf("There were usefull info after the end of file.\n");
		else
			printf("File read error.\n");
		return 1;
	}
	fclose(pointsBinaryFile);

	for (int i = 0; i < numberOfRows; ++i){
		for (int j = 0; j < numberOfColumns; ++j){
			printf("%f\n", pointsArray[i][j]);
		}
	}

	FILE *file = fopen(textFilename, "w");
	if (file == NULL){
		printf("Error opening file!\n");
		exit(1);
	}

	for (int i = 0; i < numberOfRows; ++i){
		for (int j = 0; j < numberOfColumns; ++j){
			fprintf(file, "%f", pointsArray[i][j]);
			if (j != numberOfColumns - 1){
				if (commaSeperated){
					fprintf(file, ", ");
				} else if (tabSeperated){
					fprintf(file, "\t");
				} else {
					fprintf(file, " ");
				}
			}
		}
		fprintf(file, "\n");
	}
	fclose(file);

	printf("Done! Press any key to exit.\n");
	getchar();
}