day 3: 28-first-occurrence-of-substring

28-first-occurrence-of-substring/driver.cpp

@@ -0,0 +1,10 @@
+#include "soln.hpp"
+#include <iostream>
+
+int main()	{
+	string haystack = "Drink some water, reload your mags, and let's get back out there.";
+	string needle = "water";
+	Solution soln;
+	cout << "Found correctly? " << soln.test(haystack, needle, 11) << endl;
+	return 0;
+}

28-first-occurrence-of-substring/soln.cpp

@@ -0,0 +1,18 @@
+#include "soln.hpp"
+
+int Solution::strStr(string haystack, string needle)
+{
+	int index = haystack.find(needle);
+	if (index != std::string::npos)
+	{
+		return index;
+	}
+	else
+	{
+		return -1;
+	}
+}
+
+bool Solution::test(string haystack, string needle, int answer)	{
+	return strStr(haystack, needle) == answer;
+}

28-first-occurrence-of-substring/soln.hpp

@@ -0,0 +1,9 @@
+#include <string>
+
+using namespace std;
+class Solution
+{
+public:
+	int strStr(string haystack, string needle);
+	bool test(string haystack, string needle, int answer);
+};