adding cs142 code

cs142/final/util.cpp

@@ -0,0 +1,46 @@
+#include <vector>
+#include <string>
+using namespace std;
+#include <cstdlib>
+#include "util.h"
+#include <iostream>
+
+vector<string> tokenize(const string & str, const string & delimiters) {
+    //tokenizes a string by the delimiter passed in
+    vector<string> tokens;
+    string::size_type lastPos = str.find_first_not_of(delimiters, 0);
+    string::size_type pos  = str.find_first_of(delimiters, lastPos);
+    while (string::npos != pos or string::npos != lastPos)
+    {
+        tokens.push_back(str.substr(lastPos, pos - lastPos));
+        lastPos = str.find_first_not_of(delimiters, pos);
+        pos = str.find_first_of(delimiters, lastPos);
+    }
+    return tokens;
+}
+
+bool parse_n_load(const string & input, string & name, string & type,
+        double & pay_rate) {
+    vector<string> tokens = tokenize(input);
+    if(tokens.size() == 0) {
+        return false;
+    }
+    type = tokens[0];
+    if (not (   type == "A"
+             or type == "F"
+             or type == "H"
+             or type == "S")) {
+        return false;
+    }
+    pay_rate = atof(tokens[1].c_str());
+    if(pay_rate == 0) {
+        return false;
+    }
+    for(unsigned int i = 2; i < tokens.size(); i++) {
+        name += tokens[i];
+        if(i < tokens.size() - 1) {
+            name += " ";
+        }
+    }
+    return true;
+}