Added graph input

src/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_executable(search-algorithms
     ./main.cpp
+    ./algorithm.cpp
 )
 
 target_include_directories(search-algorithms PUBLIC ${CMAKE_CURRENT_LIST_DIR})

src/algorithm.cpp

@@ -0,0 +1,52 @@
+#include "algorithm.hpp"
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <string>
+
+Graph ReadInGraph(std::string fileLocation) {
+    std::cout << fileLocation << std::endl;
+    std::ifstream graphFile(fileLocation);
+    if (!graphFile.is_open()) {
+        std::cerr << "Error opening file, check filename" << std::endl;
+        exit(1);
+    }
+    Graph newGraph;
+    graphFile >> newGraph.nodeCount;
+    newGraph.nodes.resize(newGraph.nodeCount + 1);
+    std::string line;
+    int source, destination, weight;
+    while (std::getline(graphFile, line)) {
+        std::istringstream iss(line);
+        iss >> source;
+        do {
+            iss >> destination >> weight;
+            newGraph.AddChild(source, destination, weight);
+        } while (!iss.eof());
+    }
+    graphFile.close();
+    return newGraph;
+}
+
+Node::Node(int destination, int weight) {
+    this->destination = destination;
+    this->weight = weight;
+}
+
+Graph::Graph(void) {
+    nodeCount = -1;
+}
+
+void Graph::AddChild(int source, int destination, int weight) {
+    nodes.at(source).push_back(Node(destination, weight));
+}
+
+void Graph::PrintGraph(void) {
+    for (int i = 1; i < nodes.size(); i++) {
+        std::cout << "Source " << i << " ";
+        for (auto j : nodes.at(i)) { std::cout << "-> " << j.destination; }
+        std::cout << std::endl;
+    }
+    std::cout << std::endl;
+}
+

src/algorithm.hpp

@@ -0,0 +1,23 @@
+#ifndef ALGORITHM_HPP
+#define ALGORITHM_HPP
+
+#include <string>
+#include <vector>
+
+struct Node {
+    int destination;
+    int weight;
+    Node(int destination, int weight);
+};
+
+struct Graph {
+    int nodeCount;
+    std::vector<std::vector<Node>> nodes;
+    Graph(void);
+    void AddChild(int source, int destination, int weight);
+    void PrintGraph(void);
+};
+
+Graph ReadInGraph(std::string fileLocation);
+
+#endif 

src/main.cpp

@@ -1,6 +1,12 @@
+#include "algorithm.hpp"
 #include <iostream>
 
-int main () {
+int main(int argc, char* argv[]) {
-    std::cout << "Hello world" << std::endl;
+    if (argc != 2) {
+        std::cerr << "Usage: search-algorithms graphFile.txt" << std::endl;
+        return 1;
+    }
+    Graph newGraph = ReadInGraph(argv[1]);
+    newGraph.PrintGraph();
     return 0;
 }