Added some missing imports in examples

examples/HelloWaterBox.cpp

@@ -22,6 +22,7 @@
 #include "OpenMM.h"
 
 #include <cstdio>
+#include <cstdlib>
 #include <string>
 #include <vector>
 #include <utility>
@@ -46,8 +47,8 @@ int main() {
     // ALWAYS enclose all OpenMM calls with a try/catch block to make sure that
     // usage and runtime errors are caught and reported.
     try {
-        // Load all available OpenMM plugins from their default location.
-        OpenMM::Platform::loadPluginsFromDirectory
+        // Load all available OpenMM plugins from their default location.
+        OpenMM::Platform::loadPluginsFromDirectory
             (OpenMM::Platform::getDefaultPluginsDirectory());
         simulateWaterBox();
 
@@ -121,11 +122,11 @@ static void simulateWaterBox() {
     double boxEdgeLength = waterSize * watersPerEdge;
 
     // Create periodic box
-    nonbond.setNonbondedMethod(OpenMM::NonbondedForce::CutoffPeriodic);
-    nonbond.setCutoffDistance(2);
-    nonbond.setPeriodicBoxVectors(Vec3(boxEdgeLength,0,0), Vec3(0,boxEdgeLength,0), Vec3(0,0,boxEdgeLength));
-
-    // Create data structures to hold lists of initial positions and bonds
+    nonbond.setNonbondedMethod(OpenMM::NonbondedForce::CutoffPeriodic);
+    nonbond.setCutoffDistance(2);
+    nonbond.setPeriodicBoxVectors(Vec3(boxEdgeLength,0,0), Vec3(0,boxEdgeLength,0), Vec3(0,0,boxEdgeLength));
+
+    // Create data structures to hold lists of initial positions and bonds
     std::vector<Vec3> initialPositions;
     std::vector< std::pair<int,int> > bondPairs;
     
@@ -239,9 +240,9 @@ static void simulateWaterBox() {
 static void
 writePDB(const OpenMM::OpenMMContext& context) {
     // We don't calculate energy in this example because it would take most of the time
-    const OpenMM::State state = context.getState(OpenMM::State::Positions);
-    const std::vector<Vec3>& positions = state.getPositions();
-    static int modelFrameNumber = 0; // numbering for MODEL records in pdb output
+    const OpenMM::State state = context.getState(OpenMM::State::Positions);
+    const std::vector<Vec3>& positions = state.getPositions();
+    static int modelFrameNumber = 0; // numbering for MODEL records in pdb output
 
     modelFrameNumber++;
     printf("MODEL     %d\n", modelFrameNumber);

examples/wrappers/OpenMM_CWrapper.cpp

@@ -18,6 +18,7 @@
 // -----------------------------------------------------------------------------
 
 #include "OpenMM_CWrapper.h"
+#include <cstring>
 
 // Suppress irrelevant warnings from Microsoft's compiler.
 #ifdef _MSC_VER