Restructured directories.

.gitignore

@@ -6,8 +6,8 @@
 /hw1/hw1pr3/main
 
 /hw2/hw2pr1/*.o
-/hw1/hw2pr1/main
+/hw2/hw2pr1/main
 /hw2/hw2pr2/*.o
-/hw1/hw2pr2/main
+/hw2/hw2pr2/main
 /hw2/hw2pr3/*.o
-/hw1/hw2pr3/main
+/hw2/hw2pr3/main

hw2/hw2pr1/hw2pr2.cpp

@@ -0,0 +1,223 @@
+// Name: Alexander Huddleston UIN: 223000555
+// CSCE 420
+// Due: 11:59 P.M. Monday, October 30, 2017
+// hw2pr1.cpp
+
+#include <stdio.h>
+#include <iostream>
+#include <fstream>
+#include <math.h>
+#include <limits.h>
+#include <tuple>
+#include "node.h"
+
+using namespace std;
+
+// Perform min/max on this tree.
+void minmax(node *n)
+{
+
+    if(n->getLevel() % 2 == 0)
+    {
+        int max = n->getValue();
+        
+        if(n->getChildren().size() > 0)
+        {
+            for(int c = 0; c < n->getChildren().size(); c++)
+            {
+		        minmax(n->getChildAt(c));
+
+                if(n->getChildAt(c)->getValue() > max)
+                {
+                    max = n->getChildAt(c)->getValue();
+                }
+            }
+        }
+        
+        n->setValue(max);
+        //cout << n->getValue() << endl;
+    }
+
+    else
+    {
+        int min = n->getValue();
+        
+        if(n->getChildren().size() > 0)
+        {
+            for(int c = 0; c < n->getChildren().size(); c++)
+            {
+                minmax(n->getChildAt(c));
+
+                if(n->getChildAt(c)->getValue() < min)
+                {
+                    min = n->getChildAt(c)->getValue();
+                }
+            }
+        }
+        
+        n->setValue(min);
+        //cout << n->getValue() << endl;
+    }
+}
+
+// This is mostly just a simple debug function so I can see
+// if my tree is being formed properly.
+void printTree(node n)
+{
+    cout << n.getValue() << " " << n.getLevel() << " ";
+    if(n.getChildren().size() != 0)
+    {
+        cout << "\n|\n";
+        for(node c : n.getChildren())
+        {
+            printTree(c);
+        }
+        cout << endl;
+    }
+}
+
+tuple<node, string> makeTree(string input, node n, int level)
+{
+    bool negate = false;
+    char tempc;
+    string tempn = "";
+
+    while(input.length() != 0)
+    {
+        tempc = input[0];
+        if(input.length() > 0)
+        {
+            input = input.substr(1);
+        }
+        else
+        {
+            input = "";
+        }
+
+        // If the char is a number.
+        if(isdigit(tempc))
+        {
+            tempn += tempc;
+        }
+
+	    else if(tempc == '-')
+	    {
+	        negate = true;
+	    }
+        
+        // If the char is a comma.
+        else if(tempc == ',')
+        {
+            if(tempn.length() > 0)
+            {
+                node tempnode;
+                tempnode.setLevel(level);
+		        int negatemp = stoi(tempn);
+		        if(negate)
+		        {
+		            negatemp = -negatemp;
+		        }
+                tempnode.setValue(negatemp);
+                tempnode.setParent(&n);
+                n.addChild(tempnode);
+                tempn = "";
+		        negate = false;
+            }
+        }
+
+        // If the char is a close paranthesis.
+        else if(tempc == ')')
+        {
+            if(tempn.length() > 0)
+            {
+                node tempnode;
+                tempnode.setLevel(level);
+		        int negatemp = stoi(tempn);
+		        if(negate)
+		        {
+		            negatemp = -negatemp;
+		        }
+                tempnode.setValue(negatemp);
+                tempnode.setParent(&n);
+                n.addChild(tempnode);
+                tempn = "";
+		        negate = false;
+            }
+            tuple<node, string> tempt(n, input);
+            return tempt;
+        }
+
+        // If the char is an open paranthesis.
+        else if(tempc == '(')
+        {
+            node tempnode;
+            tempnode.setLevel(level);
+            if(level % 2 == 0)
+            {
+                tempnode.setValue(INT_MIN);
+            }
+            else
+            {
+                tempnode.setValue(INT_MAX);
+            }
+            tempnode.setParent(&n);
+            tuple<node, string> tempt = makeTree(input, tempnode, level + 1);
+            tempnode = get<0>(tempt);
+            input = get<1>(tempt);
+            n.addChild(tempnode);
+        }
+    }
+
+    tuple<node, string> output(n, input);
+    return output;
+}
+
+int main(int argc, char **argv)
+{
+    // Initialization of input string.
+    string input = "";
+
+    // For testing, I want to read from a file.
+    // Typing in an tree from the keyboard each execution is a waste of time.
+    if(argc > 1)
+    {
+        if(!((string)argv[1]).substr(0, 2).compare("-f"))
+        {
+            ifstream file;
+            string line;
+            try
+            {
+                file.open("hw2pr2_data.txt");
+            }
+            catch(exception e)
+            {
+                cerr << "File not found, or could not be opened." << endl;
+            }
+            while(!file.eof())
+            {
+                getline(file, line);
+                input += line;
+            }
+        }
+    }
+
+    else
+    {
+        cout << "Please input a tree: ";
+        cin >> input;
+    }
+
+    node root;
+    root.setLevel(0);
+    root.setValue(INT_MIN);
+    tuple<node, string> tree;
+    tree = makeTree(input.substr(1), root, 1);
+    root = get<0>(tree);
+
+    printTree(root);
+    minmax(&root);
+
+    printTree(root);
+
+    return 0;
+}

hw2/hw2pr1/makefile

@@ -1,10 +1,10 @@
 all: main
 
-main: hw2pr1.o node.o
-	g++ -std=c++17 hw2pr1.o node.o -o main
+main: hw2pr2.o node.o
+	g++ -std=c++17 hw2pr2.o node.o -o main
 
-hw2pr1.o: hw2pr1.cpp
-	g++ -std=c++17 -c hw2pr1.cpp
+hw2pr1.o: hw2pr2.cpp
+	g++ -std=c++17 -c hw2pr2.cpp
 
 node.o: node.cpp node.h
 	g++ -std=c++17 -c node.cpp

hw2/hw2pr2/hw2pr2.cpp

@@ -215,7 +215,7 @@ int main(int argc, char **argv)
             string line;
             try
             {
-                file.open("hw2pr1_data.txt");
+                file.open("hw2pr2_data.txt");
             }
             catch(exception e)
             {

hw2/hw2pr2/hw2pr2_data.txt

@@ -0,0 +1 @@
+(((-2,-11,10),(2,15,13),(-1,-16,-16)),((-20,13,20),(-13,7,-19),(7,3,4)),((-20,-9,-14),(-4,-6,-12),(11,18,-3)))

hw2/hw2pr2/makefile

@@ -0,0 +1,13 @@
+all: main
+
+main: hw2pr2.o node.o
+	g++ -std=c++17 hw2pr2.o node.o -o main
+
+hw2pr1.o: hw2pr2.cpp
+	g++ -std=c++17 -c hw2pr2.cpp
+
+node.o: node.cpp node.h
+	g++ -std=c++17 -c node.cpp
+
+clean:
+	rm -rf *.o *.gch main

hw2/hw2pr2/node.cpp

@@ -0,0 +1,23 @@
+#include "node.h"
+
+using namespace std;
+    
+node::node()
+{
+    parent = NULL;
+    level = 0;
+    value = 0;
+    alpha = INT_MIN;
+    beta = INT_MAX;
+}
+
+node::node(node* n)
+{
+    parent = n->getParent();
+    level = n->getLevel();
+    value = n->getValue();
+    children = n->getChildren();
+    alpha = n->getAlpha();
+    beta = n->getBeta();
+}
+

hw2/hw2pr2/node.h

@@ -0,0 +1,37 @@
+#ifndef NODE_H
+#define NODE_H
+
+#include <vector>
+#include <limits.h>
+
+using namespace std;
+
+class node
+{
+    private:
+        node* parent;
+        int level;
+        int value;
+        vector<node> children;
+	int alpha;
+	int beta;
+    public:
+        node();
+        node(node *n);
+        void setParent(node* p) { parent = p; };
+        node* getParent() { return parent; };
+        void setLevel(int l) { level = l; };
+        int getLevel() { return level; };
+        void setValue(int v) { value = v; };
+        int getValue() { return value; };
+        void setChildren(vector<node> c) { children = c; };
+        void addChild(node n) { children.push_back(n); };
+        vector<node> getChildren() { return children; };
+        node* getChildAt(int i) { return &children.at(i); };
+	void setAlpha(int a) { alpha = a; };
+	int getAlpha() { return alpha; };
+	void setBeta(int b) { beta = b; };
+	int getBeta() { return beta; };
+};
+
+#endif