git-svn-id: svn://db.shs.com.ru/pip@6 12ceb7fc-bf1f-11e4-8940-5bc7170c53b5

doc/examples/pievaluator.cpp

@@ -0,0 +1,31 @@
+#include "pip.h"
+
+void _() {
+//! [main]
+PIEvaluator eval;
+
+eval.check("e2eelge");
+
+piCout << eval.expression() << "=" << eval.evaluate();
+// e*2*e*e*lg(e) = (17.4461; 0)
+
+eval.check("10x");
+
+piCout << eval.error() << eval.unknownVariables();
+// Unknown variables: "x" {"x"}
+
+eval.setVariable("x", complexd(1, 2));
+eval.check("10x");
+
+piCout << eval.error() << eval.unknownVariables();
+// Correct {}
+
+piCout << eval.expression() << "=" << eval.evaluate();
+// 10*x = (10; 20)
+
+eval.setVariable("x", complexd(-2, 0));
+
+piCout << eval.expression() << "=" << eval.evaluate();
+// 10*x = (-20; 0)
+//! [main]
+};