diff --git a/main.cpp b/main.cpp
index 1c28f41..125f0d9 100644
--- a/main.cpp
+++ b/main.cpp
@@ -70,22 +70,22 @@ double chordMethod(double left, double right, double error, double (*f)(double x
 
 double chordMethod2(double left, double right, double error, double (*f)(double))
 {
-  double c;
+  double center;
 
-  while(std::fabs( f(right) - f(left) ) > error)
+  while(std::fabs(right - left) > error)
   {
-    c = ( f(right) * left - f(left) * right) / ( f(right) - f(left) );
+    center = ( f(right) * left - f(left) * right) / ( f(right) - f(left) );
 
-    if( f(left) * f(c) > 0) 
+    if( f(left) * f(center) < 0) 
     {
-      left = c;
+      right = center;
     }
     else {
-      right = c;
+      left = center;
     }
   }
 
-  return c;
+  return center;
 }
 
 int main()