adding cs235

cs235/lab02/Student_Code/circle.cpp

@@ -0,0 +1,88 @@
+#include <vector>
+#include "circle.h"
+
+ostream & operator<<(ostream & os, vector<string> strings) {
+    for(unsigned int i = 0; i < strings.size(); i++)
+        os << strings[i] << ", ";
+    os << endl;
+    return os;
+}
+
+vector<string> circle::getNames() {
+    vector<string> names; 
+    names.push_back("Josephus");
+    names.push_back("A");
+    names.push_back("B");
+    names.push_back("C");
+    names.push_back("D");
+    names.push_back("E");
+    names.push_back("F");
+    names.push_back("G");
+    names.push_back("H");
+    names.push_back("I");
+    names.push_back("J");
+    names.push_back("K");
+    names.push_back("L");
+    names.push_back("M");
+    names.push_back("N");
+    names.push_back("O");
+    names.push_back("P");
+    names.push_back("Q");
+    names.push_back("R");
+    names.push_back("S");
+    return names;
+}
+vector<string> circle::playGame(int n, int m) {
+    vector<string> names = getNames();
+    vector<string> temp;
+    if(n < 10 || n > 20){
+        names.clear();
+        return names;
+    }
+    if(m < 1){
+        names.clear();
+        return names;
+    }
+    for(int i = 0; i < 20 - n; i++) {
+        names.pop_back();
+    }
+    unsigned int count = 0;
+    for(int i = 0; i < n; i++) {
+        int hits = 0;
+        while(hits < m) {
+            if(names[count] == ""){
+            }
+            else {
+                hits++;
+                if(hits == m) {
+                    temp.push_back(names[count]);
+                    names[count] = "";
+                    hits = 100;
+                }
+            }
+            count++;
+            if(count+1 > names.size()) {
+                count = 0;
+            }
+        }
+    }
+    return temp;
+}
+
+int circle::reportSafeIndex(int n, int m) {
+    if(m < 1) {
+        return -1;
+    }
+    else if (n < 10 || n > 20){
+        return -1;
+    }
+    vector<string> names = getNames();
+    vector<string> kill_list = playGame(n, m);
+    string safe_person_name = kill_list[kill_list.size() - 1];
+    for(unsigned int i = 0; i < names.size(); i++) {
+        if(safe_person_name == names[i]) {
+            return i;
+        }
+    }
+    return -1;
+}