New Folder Structure because of mail 2019-11-21T16:35

ex1.3/join_strings.cpp

@@ -0,0 +1,53 @@
+#include <iostream>
+#include <string.h>
+
+// join will return a pointer of type 'char'
+char* join(const char*, const char*) ;
+char* joinb(const char*, const char*) ;
+
+
+int main()
+{
+	std::cout << join("alpha","bet") << std::endl ;
+	std::cout << joinb("duck","soup") << std::endl ;
+	
+	return 0 ;
+}
+
+/* this function is owner of new_str,
+ * since it doesn't delete it, there is leakage
+ */
+
+char* join(const char* str1 , const char* str2)
+{
+	/* use 'new' because we don't know how big the strings are going to be
+	 * the length should be 'strlen(str1) + strlen(str2) + 1'
+	 *  since strlen does not count the null bytes we need to add one
+	 */
+
+	int size = strlen(str1) + strlen(str2) + 1;
+
+	char* new_str = new char[size];
+	*new_str =  0; // Null String
+
+	strcat(new_str, str1); // new_str = 0 + str1
+	strcat(new_str, str2); // new_str = new_str + str2
+
+	return new_str;
+
+}
+
+char* joinb(const char* str1 , const char* str2)
+{
+	int size = strlen(str1) + strlen(str2) + 1;
+
+	char* new_str = new char[size];
+	*new_str =  0;
+
+	strcat(new_str, str1);
+	strcat(new_str, " "); // insert space, note it is important to have it as a string => \"
+	strcat(new_str, str2);
+
+	return new_str;
+
+}