Fixed my old formatting and patched things that were left as-is due to burnout and laziness

alg_4_3.cpp

@@ -1,55 +1,57 @@
 #include <iostream>
-using namespace std;
+#include <cmath>
 
 double root(int n)
 {
-    double L, R, B;
-    L = 0; R = n;
+  double L, R, B;
+  L = 0; R = n;
 
-    while (fabs(R - L) > 0.00001)
+  while (std::fabs(R - L) > 0.00001)
+  {
+    B = (L + R) / 2;
+
+    if ( B*B > n)
     {
-        B = (L + R) / 2;
-
-        if ( B*B > n)
-        {
-            R = B;
-        }
-        else {
-            L = B;
-        }
+      R = B;
     }
-    return B;
+    else {
+      L = B;
+    }
+  }
+  return B;
 }
 
 double root_hf_div(double n, double L, double R)
 {
-    double B;
+  double B;
 
-    if (fabs(R - L) < 0.00001)
-    {
-        return (L + R) / 2;
-    }
-    else
-    {
-        B = (L + R) / 2;
+  if (std::fabs(R - L) < 0.00001)
+  {
+      return (L + R) / 2;
+  }
+  else
+  {
+      B = (L + R) / 2;
 
-        if ((B * B) > n)
-        {
-            return root_hf_div(n, L, B);
-        }
-        else
-        {
-            return root_hf_div(n, B, R);
-        }
-    }
+      if ((B * B) > n)
+      {
+          return root_hf_div(n, L, B);
+      }
+      else
+      {
+          return root_hf_div(n, B, R);
+      }
+  }
 }
 
 int main()
 {
-    setlocale(LC_ALL, "Russian");
-	double n; cin >> n;
+  setlocale(LC_ALL, "Russian");
+	double n;
 
-    cout << "Обычный: " << root(n) << endl;
-	
-    cout << "Рекурсивный: " << root_hf_div(n, 1, n) << endl;
-}
+  std::cout << "Введите число n для определения корня: ";
+  std::cin >> n;
+
+  std::cout << "Обычный: " << root(n) << std::endl;
+  std::cout << "Рекурсивный: " << root_hf_div(n, 1, n) << std::endl;
+}