checks for input, restructured project files

Makefile

@@ -0,0 +1,2 @@
+voronoi1 : voronoi.c
+	gcc -Wall -Wextra -pedantic -g -o voronoi1 voronoi.c

voronoi.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "voronoi.h"
+
+int main(int argc, char **argv) {
+    FILE *dataset = NULL, *polygonData = NULL, *output = NULL;
+    checkInputArgs(argc, argv, &dataset, &polygonData, &output);
+
+    fclose(dataset);
+    fclose(polygonData);
+    fclose(output);
+    return 0;
+}
+
+void checkInputArgs(int argc, char **argv, FILE **datasetFile, \
+FILE **polygonFile, FILE **outputFile) {
+    char *openFileError = "Error: Unable to open file %s\n";
+    char *numFilesError = "Error: Incorrect number of inputs (3 required).\n";
+
+    if (argc != 4) {
+        fputs(numFilesError, stderr);
+        exit(EXIT_FAILURE);
+    }
+
+    *datasetFile = fopen(argv[1], "r");
+    if (*datasetFile == NULL) {
+        fprintf(stderr, openFileError, argv[1]);
+        exit(EXIT_FAILURE);
+    }
+    
+    *polygonFile = fopen(argv[2], "r");
+    if (*polygonFile == NULL) {
+        fprintf(stderr, openFileError, argv[2]);
+        exit(EXIT_FAILURE);
+    }
+
+    *outputFile = fopen(argv[3], "w");
+    if (*outputFile == NULL) {
+        fprintf(stderr, openFileError, argv[3]);
+        exit(EXIT_FAILURE);
+    }
+}

voronoi.h

@@ -0,0 +1,2 @@
+void checkInputArgs(int argc, char **argv, FILE **datasetFile, \
+FILE **polygonFile, FILE **outputFile);

voronoi1.c

@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main(int argc, char **argv) {
-    puts("Hello World!");
-    return 0;
-}