First commit

IUT/Info1/TD/Exercices/6.8.1_polynome/fonction.cpp

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+#include <math.h>
+#include <iostream>
+#include "fonction.h"
+using namespace std;
+
+double calcul_discriminant(double a, double b, double c) {
+    return (b*b - 4 * a * c);
+}
+void calcul_racines(double a, double b, double c) {
+    double discriminant;
+    discriminant = calcul_discriminant(a, b, c);
+
+    if (discriminant >= -pow(10, -10)
+        && discriminant <= pow(10, -10)
+        ) {
+            discriminant = 0;
+        }
+    if (discriminant < 0) {
+        cout << "delta = " << discriminant << endl;
+        return;
+    } else if (discriminant == 0) {
+        double x0 = (-b/ (2*a));
+
+        cout << "delta = " << discriminant << endl;
+        cout << "La racines est " << x0 << endl;
+        return;
+    }
+    double x1;
+    double x2;
+    x1 = (-b - sqrt(discriminant)) / (2 * a);
+    x2 = (-b + sqrt(discriminant)) / (2 * a);
+    cout << "delta = " << discriminant << endl;
+    cout << "Les racines sont " << x1 << " " << x2 << endl;
+    return;
+}