adding lab 3

labs/03_debugging/point.cpp

@@ -0,0 +1,25 @@
+#include <cmath>
+#include <iomanip>
+#include "point.h"
+
+
+// A helper function to print a Point.
+std::ostream& operator<< (std::ostream &ostr, const Point &p) {
+  ostr << std::fixed << std::setprecision(1)
+       << "<"
+       << std::setw(5) << p.get_x() << ","
+       << std::setw(5) << p.get_y() << ","
+       << std::setw(5) << p.get_z() << ">";
+  return ostr;
+}
+
+
+// A helper function to compute the slope between two Points.
+double compute_slope(const Point &a, const Point &b) {
+  double rise = b.get_y() - a.get_y();
+  double run_x = b.get_x() - a.get_x();
+  double run_z = b.get_z() - a.get_z();
+  double run = sqrt(run_x*run_x + run_z*run_z);
+  double answer = rise / run;
+  return rise / run;
+}