Difference between revisions of "Statistical Algorithms Importer: Linux-compiled Project FAQ"

//============================================================================
// Name        : BasicStatistic.cpp
// Author      : Giancarlo Panichi
// Version     :
// Copyright   : GNU GENERAL PUBLIC LICENSE. Version 3.0
// Description : BasicStatistic in C++, Ansi-style
//============================================================================
 
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
using namespace std;
 
int main(int argc, char **argv) {
	printf("BasicStatistic");
	printf("Operator: %s\n", argv[1]);
	printf("Maximum number of items considered: %s\n", argv[2]);
	printf("Input file: %s\n", argv[3]);
 
	FILE * finput;
	char * line = NULL;
	size_t len = 0;
	ssize_t read;
 
	finput = fopen(argv[3], "r");
	if (finput == NULL) {
		printf("No input file found: %s\n", argv[3]);
		return -1;
	}
 
	int limit = atoi(argv[2]);
	int i = 0;
	int value = 0;
	int result = 0;
 
	while (((read = getline(&line, &len, finput)) != -1)
			&& (i < limit || limit == -1)) {
		printf("Retrieved line of length %zu and value: %s", read, line);
		value = atoi(line);
		if (i == 0) {
			result = value;
		} else {
			if (strcmp(argv[1], "max") == 0) {
				if (value > result) {
					result = value;
				}
			} else {
				if (strcmp(argv[1], "min") == 0) {
					if (value < result) {
						result = value;
					}
				} else {
					if (strcmp(argv[1], "average") == 0) {
						result = result + value;
					} else {
						break;
					}
				}
			}
		}
 
		i++;
	}
 
	if (strcmp(argv[1], "average") == 0 && i > 0) {
		result = result / i;
	}
 
	fclose(finput);
	if (line) {
		free(line);
	}
 
	//Write result
	FILE *foutput = fopen("output.txt", "w");
	if (foutput == NULL) {
		printf("Error opening file!\n");
		return -1;
	}
 
	fprintf(foutput, "BasicStatistic Result: \n");
	fprintf(foutput, "%d\n", result);
	fclose(foutput);
 
	return 0;
}