improve printer

src/printer_solutions.c

@@ -0,0 +1,69 @@
+/* printer.c */
+
+#include "computorv1.h"
+
+static void print_solution_degree_1(s_solution_degree_1 solution)
+{
+    ft_printf("The solution is:\n");
+    printf("%g\n", solution.solution);
+}
+
+static void print_solution_delta_zero(s_solution_degree_2 solution)
+{
+    ft_printf("Discriminant is equal to zero, the solution is:\n");
+    printf("%g\n", solution.first_term);
+}
+
+static void print_solution_delta_positiv(s_solution_degree_2 solution)
+{
+    ft_printf("Discriminant is strictly positive, the two solutions are:\n");
+    printf("%g\n", solution.first_term + solution.second_term);
+    printf("%g\n", solution.first_term - solution.second_term);
+}
+
+static void print_solution_delta_negativ(s_solution_degree_2 solution)
+{
+    ft_printf("Discriminant is strictly negative, the two complex solutions are:\n");
+
+    // solution 1
+    if (solution.b)
+        printf("%g/%g + ", solution.b * -1, solution.a * 2);
+    printf("%gi/%g\n", solution.delta_sqrt, solution.a * 2);
+
+    // solution 2
+    if (solution.b)
+        printf("%g/%g - ", solution.b * -1, solution.a * 2);
+    else
+        printf("-");
+    printf("%gi/%g\n", solution.delta_sqrt, solution.a * 2);
+}
+
+void print_solution(s_solution *solution)
+{
+    s_solution_degree_2 solution_d2;
+    e_delta_sign delta_sign;
+
+    // degree 1
+
+    if (solution->degree == 1)
+    {
+        return print_solution_degree_1(solution->solution_degree_1);
+    }
+    else if (solution->degree == 2)
+    {
+        solution_d2 = solution->solution_degree_2;
+        delta_sign = solution_d2.delta_sign;
+        if (delta_sign == 0)
+            print_solution_delta_zero(solution_d2);
+        else if (delta_sign > 0)
+            print_solution_delta_positiv(solution_d2);
+        else if (delta_sign < 0)
+            print_solution_delta_negativ(solution_d2);
+        else
+            stop_errors("delta sign is wrong : '%i' , delta : '%g'", solution_d2.delta_sign, solution_d2.delta);
+    }
+    else
+    {
+        stop_errors("The degree is '%i', it should already have been handled.", solution->degree);
+    }
+}