First commit

IUT/Info1/TD/Exercices/8.3_racines_carree/fonctions.cpp

@@ -0,0 +1,8 @@
+float racine_carree(float a, unsigned int n) {
+    float root = 1;
+
+    for (int i=0; i < n; i++) {
+        root = (root + a / root) / 2;
+    }
+    return root;
+}