Added Assignment 3 worksheet and code

1 files changed, 77 insertions, 0 deletions

diff --git a/dev/a3-earthquake/earthquake_database.cc b/dev/a3-earthquake/earthquake_database.cc
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+++ b/dev/a3-earthquake/earthquake_database.cc
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+/** CSci-4611 Assignment 3:  Earthquake
+ */
+
+#include <fstream>
+#include <algorithm>
+
+#include "earthquake_database.h"
+
+
+EarthquakeDatabase::EarthquakeDatabase(std::string filename) {
+    
+    std::ifstream in(filename.c_str());
+    std::string line;
+    while (getline(in, line)) {
+        if (line.size() > 30) {
+            Earthquake e(line);
+            if (earthquakes.size() == 0) {
+                min_mag_ = (float)e.magnitude();
+                max_mag_ = (float)e.magnitude();
+            }
+            if (e.magnitude() > max_mag_) {
+                max_mag_ = (float)e.magnitude();
+            }
+            if (e.magnitude() < min_mag_) {
+                min_mag_ = (float)e.magnitude();
+            }
+            earthquakes.push_back(e);
+        }
+    }
+}
+
+Earthquake EarthquakeDatabase::earthquake(int index) {
+    return earthquakes[index];
+}
+
+int EarthquakeDatabase::min_index() {
+    return 250;
+}
+
+int EarthquakeDatabase::max_index() {
+    return (int)earthquakes.size() - 1;
+}
+
+int EarthquakeDatabase::FindMostRecentQuake(Date d) {
+    double targetSeconds = d.ToSeconds();
+    int start = min_index();
+    int end = max_index();
+    while (start < end-1) {
+        int half = (start + end) / 2;
+        if (earthquakes[half].date().ToSeconds() > targetSeconds) {
+            end = half - 1;
+        }
+        else {
+            start = half;
+        }
+    }
+    if (start == end) {
+        return start;
+    }
+    else {
+        if (earthquakes[end].date().ToSeconds() > targetSeconds) {
+            return start;
+        }
+        else {
+            return end;
+        }
+    }
+}
+
+float EarthquakeDatabase::min_magnitude() {
+    return min_mag_;
+}
+
+float EarthquakeDatabase::max_magnitude() {
+    return max_mag_;
+}
+