ASCII Mandelbrot Set in C

mandelbrot-ascii-c/mandelbrot.c

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+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#define MIN_X -2.5
+#define MAX_X 1.5
+
+#define MIN_Y -1.5
+#define MAX_Y 1.5
+
+#define ITER 100
+
+int get_window_size(int *rows, int *cols) {
+    struct winsize w;
+    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) == -1) {
+        return -1; // Error getting terminal size
+    }
+    *rows = w.ws_col;
+    *cols = w.ws_row;
+    return 0;
+}
+
+double map(double n, double start1, double stop1, double start2, double stop2) {
+    return (n - start1) / (stop1 - start1) * (stop2 - start2) + start2;
+}
+
+int main() {
+    int width, height;
+    if (get_window_size(&width, &height) != 0) {
+        printf("Failed to get terminal size\n");
+        return 1;
+    }
+    for (double row = 0; row < height; row++) {
+        double y = map(row, 0, height, MIN_Y, MAX_Y);
+        for (double col = 0; col < width; col++) {
+            double x = map(col, 0, width, MIN_X, MAX_X);
+
+            double c_real = x;
+            double c_imag = y;
+
+            double z_real = 0;
+            double z_imag = 0;
+
+            int iter;
+            for (iter = 0; iter < ITER; iter++) {
+                double z_real_new = z_real * z_real - z_imag * z_imag + c_real;
+                double z_imag_new = 2 * z_real * z_imag + c_imag;
+
+                z_real = z_real_new;
+                z_imag = z_imag_new;
+
+                double magnitude_squared = z_real * z_real + z_imag * z_imag;
+                if (magnitude_squared > 4) {
+                    break;
+                }
+            }
+
+            if (iter == ITER) {
+                putchar('*'); // Point is in the set
+            } else if (iter > ITER / 2) {
+                putchar('-');
+            } else if (iter > ITER / 3) {
+                putchar('+');
+            } else {
+                putchar(' '); // Point diverged
+            }
+        }
+        putchar('\n');
+    }
+
+    return 0;
+}

mandelbrot-ascii-c/readme.md

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+# ASCII Mandelbrot (C)
+
+This program renders a low-resolution ASCII visualization of the Mandelbrot Set directly in the terminal.
+It adapts to the terminal windows dimensions.
+
+### How to Run
+```bash
+gcc mandelbrot.c -o mandelbrot
+./mandelbrot
+```
+
+### Example Output
+```txt
+
+
+                                                                                               *
+                                                                                           -
+                                                                                    +++  +**-   +
+                                                                                       ********
+                                                                                      +********
+                                                                         ++     **-+***********-+* *-+      +
+                                                                          -***+************************ +***-
+                                                                      +   +********************************-
+                                                                      +**************************************
+                                               +       ++           ---****************************************
+                                                   *++  +*+ -      +******************************************
+                                                  +************-   ********************************************+
+                                                -****************-+*******************************************+
+                                           *-*++*************************************************************
+                   **************************************************************************************+
+                                           *-*++*************************************************************
+                                                -****************-+*******************************************+
+                                                  +************-   ********************************************+
+                                                   *++  +*+ -      +******************************************
+                                               +       ++           ---****************************************
+                                                                      +**************************************
+                                                                      +   +********************************-
+                                                                          -***+************************ +***-
+                                                                         ++     **-+***********-+* *-+      +
+                                                                                      +********
+                                                                                       ********
+                                                                                    +++  +**-   +
+                                                                                           -
+                                                                                               *
+
+
+```