Make clang-tidy a little happier

DLASystem.cpp

@@ -38,7 +38,7 @@ int DLASystem::readGrid(std::array<double, 2> pos) {
 // add a particle to the system at a specific position
 void DLASystem::addParticle(std::array<double, 2> pos) {
     // create a new particle
-    Particle *p = new Particle(pos);
+    auto *p = new Particle(pos);
     // push_back means "add this to the end of the list"
     particleList.push_back(p);
 
@@ -144,7 +144,7 @@ int DLASystem::checkStick() {
     int result = 0;
     // loop over neighbours
     for (int i = 0; i < 4; i++) {
-        std::array<double, 2> checkpos;
+        std::array<double, 2> checkpos{};
         setPosNeighbour(checkpos, lastP->pos, i);
         // if the neighbour is occupied...
         if (readGrid(checkpos) == 1)
@@ -169,14 +169,6 @@ DLASystem::DLASystem(Config config)
     /*
      * Handle grid data structure.
      * */
-
-//    // set the grid to zero
-//    for (int i = 0; i < gridSize; i++) {
-//        for (int j = 0; j < gridSize; j++) {
-//            grid[i][j] = 0;
-//        }
-//    }
-
     // Add particle to the centre of the grid to start
     std::array<double, 2> pos{0.0, 0.0};
     addParticle(pos);

DLASystem.h

@@ -2,12 +2,12 @@
 
 #include <iostream>
 #include <fstream>
-#include <stdio.h>
+#include <cstdio>
 #include <vector>
 
 #define _USE_MATH_DEFINES
 
-#include <math.h>
+#include <cmath>
 #include <random>
 #include <string>
 #include <sstream>
@@ -81,7 +81,7 @@ public:
     int lastParticleIsActive;
 
     // constructor
-    DLASystem(Config config);
+    explicit DLASystem(Config config);
 
     // destructor
     ~DLASystem();