118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
#include "tools.h"
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points getPoints(void) {
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int fileOrRandom;
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printf("0 - if points from file\n1 - if random generation of points\nYour choice: ");
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if (scanf("%d", &fileOrRandom) < 1) {
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printf("Enter error!\n");
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return (points){NULL, 0};
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}
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if (fileOrRandom == 0) {
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return getPointsFromFile();
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} else if (fileOrRandom == 1) {
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return getRandomPoints();
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} else {
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printf("Wrong enter!\n");
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return (points){NULL, 0};
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}
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}
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points getPointsFromFile(void) {
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FILE * file = getFile();
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points pts = (points){NULL, 0};
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if (file == NULL) return (points){NULL, 0};
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pts = getFilePoints(file);
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fclose(file);
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return pts;
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}
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FILE * getFile(void) {
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char filename[50];
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printf("Enter file name: ");
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if (scanf("%s", filename) == 1) {
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FILE * file = fopen(filename, "r");
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if (file == NULL) {
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printf("Error file!\n)");
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return NULL;
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} else {
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return file;
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}
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} else {
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printf("Empty name!\n");
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return NULL;
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}
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}
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points getFilePoints(FILE * file) {
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int i, size = 2;
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point * array = NULL;
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point p;
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double current;
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if (fscanf(file, "%lf", ¤t) != 1) {
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printf("File is empty!\n");
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return (points){NULL, 0};
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}
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array = (point *)malloc(size * sizeof(point));
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i = 0, p.x = current;
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while (fscanf(file, "%lf", ¤t) == 1) {
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if (++i / 2 >= size) {
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size *= 2;
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array = (point *)realloc(array, size * sizeof(point));
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if (array == NULL) return (points){NULL, 0};
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}
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if (i % 2 == 1) {
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p.y = current;
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array[i / 2] = p;
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} else p.x = current;
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}
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if (i == 0) {
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printf("Array is empty!\n");
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free(array);
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return (points){NULL, 0};
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}
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return (points){array, (i + 1) / 2};
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}
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points getRandomPoints(void) {
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points pts = (points){.array=NULL, .length=0};
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int length;
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printf("Enter the number of points: ");
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if (scanf("%d", &length) < 1) return pts;
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pts.length = length;
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pts.array = (point *)malloc(length * sizeof(point));
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if (pts.array == NULL) return pts;
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generatePoints(&pts);
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return pts;
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}
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void generatePoints(points * pts) {
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srand(time(NULL));
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for (int i = 0; i < pts->length; i++) {
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(pts->array[i]).x = (rand() % (2*MAX_RAND_COORD + 1) - MAX_RAND_COORD) * RAND_MULTIPLIER;
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(pts->array[i]).y = (rand() % (2*MAX_RAND_COORD + 1) - MAX_RAND_COORD) * RAND_MULTIPLIER;
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}
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}
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void printPoints(points pts) {
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for (int i = 0; i < ((MAX_PRINT_POINTS < pts.length) ? MAX_PRINT_POINTS : pts.length); ++i) {
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printf("%c = (%.4lf, %.4lf)\n", i + ASCII_FIRST_LETTER, pts.array[i].x, pts.array[i].y);
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}
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}
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