Написал 10ю задачу по Геометрии

ComputationalGeometry/10Ex/tools.c

@@ -0,0 +1,74 @@
+#include "tools.h"
+
+FILE * getFile(void) {
+	char filename[50];
+
+	printf("Enter file name: ");
+	if (scanf("%s", filename) == 1) {
+		FILE * file = fopen(filename, "r");
+		if (file == NULL) {
+			printf("Error file!\n)");
+			return NULL;
+		} else {
+			return file;
+		}
+	} else {
+		printf("Empty name!\n");
+		return NULL;
+	}
+}
+
+points getPoints(FILE * file) {
+	int i, size = 2;
+	point * array = NULL;
+	point p;
+	double current;
+
+	if (fscanf(file, "%lf", &current) != 1) {
+		printf("File is empty!\n");
+		return (points){.arr=NULL, 0};
+	}
+
+	array = (point *)malloc(size * sizeof(point));
+
+	i = 0, p.x = current;
+	while (fscanf(file, "%lf", &current) == 1) {
+		if (++i / 2 >= size) {
+			size *= 2;
+			array = (point *)realloc(array, size * sizeof(point));
+		}
+
+		if (i % 2 == 1) {
+			p.y = current;
+			array[i / 2] = p;
+		} else p.x = current;
+	}
+
+	if (i == 0) {
+		printf("Array is empty!\n");
+		return (points){.arr=NULL, 0};
+	}
+
+	return (points){array, (i + 1) / 2};
+}
+
+double getShift(void) {
+	double shift;
+
+	printf("Enter the Shift: ");
+
+	if (scanf("%lf", &shift) == 1) return shift;
+	else {
+		printf("\nThe Shift is zero!\n");
+		return 0;
+	}
+}
+
+void printPolygon(polygon plgn, const char * str) {
+	printf("%s", str);
+
+	for (int i  = 0; i < plgn.pts.len; ++i) {
+		printf("%c = (%.2lf, %.2lf)\n", i + 65, plgn.pts.arr[i].x, plgn.pts.arr[i].y);
+	}
+}
+