Homework-15

hw15/ExtractAllNumbers.cpp

+#include<iostream>
+#include<string>
+#include<regex>
+
+using namespace std;
+
+int main() {
+/*  
+  string text("How now, brown cow");
+  cout << boolalpha;
+  regex ow("ow");
+  regex Hstarw("H.*?w");
+  cout << regex_match(text, ow) << endl;
+  cout << regex_match(text, Hstarw) << endl;
+  cout << regex_search(text, ow) << endl;
+  
+  smatch results;
+  regex_search(text, results, Hstarw);
+  copy(results.begin(), results.end(), ostream_iterator<string>(cout, "\n"));
+*/
+  string seq = "Here are some numbers: 1.23, 4, 5.6, 7.89";
+  regex rgx("(\\d)\\.(\\d*)");
+  smatch r;
+  while (regex_search (seq, r, rgx)) {
+    cout << r[1] << " is before the decimal and " << r[2] << " is after the decimal" << endl;
+    seq = r.suffix().str();
+  }
+  
+  return 0;
+}
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hw15/HurdatAnalysis.cpp

+#include<iostream>
+#include<fstream>
+#include<string>
+#include<regex>
+
+using namespace std;
+
+int main() {
+  ifstream inp("hurdat_atlantic_1851-2011.txt");
+  
+  int c = 0;
+  double tot = -1;
+  regex rgx("(\\d{2})/(\\d{2})/(\\d{4})");
+  smatch r;
+  string R = "";
+  for(string line; getline(inp, line);) {
+    if(regex_search(line, r, rgx)) {
+      if(r[3] != R) {
+        if(tot != -1) {
+          cout << c << ' ' << R << ' ' << tot << endl;
+        }
+        c++;
+        R = r[3];
+        tot = 0;
+      }
+    }
+    else {
+      if(line.back() == '*') {
+        tot += (stoi(line.substr(20, 22)) + stoi(line.substr(37, 39)) + stoi(line.substr(54, 56)) + stoi(line.substr(71, 73)))/4.0;
+        break;
+      }
+    }
+  }
+  cout << c << ' ' << R << ' ' << tot << endl;
+
+  return 0;
+}
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