fix output beautify error

src/utils/printer.c

@@ -15,29 +15,125 @@ void print_debug(const char *description, ...)
     va_end(args);
 }
 
-void print_reduced_form(double *polynom, int max_exponent)
+/**
+- [x] : ./computorv1 -b "3x² + 0x -0 = x"
+        Reduced form: 3x² - = 0
+- [x] : ./computorv1 -b "3x² + 0x -7 = x"
+        Reduced form: 3x² - - 7 = 0
+- [x] : ./computorv1 -b "-3x² + 2x -7 = x"
+        Reduced form: -+ x - 7 = 0
+ */
+static void print_reduced_form_beautify(double *polynom, int max_exponent)
 {
     int i;
+    bool is_first_term;
+    double value;
+    int sign;
 
-    // reduced form
     ft_putstr("Reduced form: ");
+
     i = max_exponent;
-    printf("%g * x^%i ", ft_fabs(polynom[i]), i);
-    fflush(stdout);
-    i--;
+    is_first_term = true;
     while (i >= 0)
     {
-        if (polynom[i] >= 0)
+        value = ft_fabs(polynom[i]);
+        sign = ft_sign_f(polynom[i]);
+        // dprintf(STDERR_FILENO, "\nDEBUG: polynom[%i]: %g, sign: %i\n", i, value, sign); // debug
+
+        // if term is zero dont output
+        if (value == 0)
         {
-            ft_putchar('+');
+            // ft_dprintf(STDERR_FILENO, "DEBUG: is 0\n"); // debug
+            i--;
+            continue;
+        }
+        // ft_dprintf(STDERR_FILENO, "DEBUG: is not 0\n"); // debug
+
+        // print sign
+        if (sign > 0)
+        {
+            // don't output '+' if is first term
+            if (!is_first_term)
+                ft_putchar('+');
         }
         else
         {
             ft_putchar('-');
         }
-        printf(" %g * x^%i ", ft_fabs(polynom[i]), i);
+
+        // print term
+        if (!is_first_term)
+        {
+            ft_putchar(' ');
+        }
+
+        // for x⁰
+        if (i == 0)
+        {
+            printf("%g ", value);
+        }
+
+        // for x¹
+        if (i == 1)
+        {
+            if (value == 1)
+                printf("x ");
+            if (value > 1)
+                printf("%gx ", value);
+        }
+
+        // for x²
+        if (i >= 2)
+        {
+            if (value == 1)
+                printf("x%s ", ft_superscript(i + '0'));
+            if (value > 1)
+                printf("%gx%s ", value, ft_superscript(i + '0'));
+        }
         fflush(stdout);
+
         i--;
+        is_first_term = false;
+    }
+    ft_putstr("= 0\n");
+}
+
+void print_reduced_form(double *polynom, int max_exponent)
+{
+    int i;
+    bool is_first_term;
+
+    if (flag_beautify_mode)
+        return print_reduced_form_beautify(polynom, max_exponent);
+
+    // reduced form
+    ft_putstr("Reduced form: ");
+    i = max_exponent;
+    is_first_term = true;
+    while (i >= 0)
+    {
+        // print sign
+        if (polynom[i] > 0)
+        {
+            // don't output '+' if is first term
+            if (!is_first_term)
+                ft_putchar('+');
+        }
+        else
+        {
+            ft_putchar('-');
+        }
+
+        // print term
+        if (!is_first_term)
+        {
+            ft_putchar(' ');
+        }
+        printf("%g * x^%i ", ft_fabs(polynom[i]), i);
+        fflush(stdout);
+
+        i--;
+        is_first_term = false;
     }
     ft_putstr("= 0\n");
 }