Added optional_function_args

.gitignore

@@ -1 +1,2 @@
 a.out
+test

optional_function_args/Makefile

@@ -0,0 +1,21 @@
+#OBJS specifies which files to compile as part of the project
+OBJS = main.c
+
+#CC specifies which compiler to use
+CC = clang
+
+#COMPILER_FLAGS specifies the additional compilation options we're using
+# -w suppress all warnings
+COMPILER_FLAGS = -Wall
+
+#LINKER_FLAGS specifies the libraries we're linking against
+LINKER_FLAGS =
+
+#OBJ_NAME specifies the name of our executable
+OBJ_NAME= test
+
+#This is the target that compiles our executable
+all	:	$(OBJS)
+	$(CC) $(OBJS) $(COMPILER_FLAGS) $(LINKER_FLAGS) -o $(OBJ_NAME)
+clean :
+	rm test

optional_function_args/main.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+void example(int number_of_args, ...);
+
+int main()
+{
+	char some_var[100] = "opt1";
+	char some_var2[100] = "opt2";
+	char some_var3[100] = "opt3";
+
+	char *psome_var = some_var;
+	char *psome_var2 = some_var2;
+	char *psome_var3 = some_var3;;
+
+
+
+	example(4, psome_var, psome_var2, psome_var3, psome_var);
+//	printf("Print array %s \n", some_var);
+
+	return 0;
+}
+
+void example(int number_of_args, ...)
+{
+	int i;
+	va_list curr_arg;
+
+// the first option tells us the number of args... so therefore opt1=numberofargs.
+  va_start(curr_arg, number_of_args);
+
+	for(i = 0; i < number_of_args; i++)
+	{ 
+		printf("arg %d is: %s\n", i, va_arg(curr_arg, char*));
+
+	}
+
+	
+	
+	/*	printf("First arg: %s\n", va_arg(curr_arg, char*));
+	printf("second arg: %s\n", va_arg(curr_arg, char*));
+	printf("third arg: %s\n", va_arg(curr_arg, char*));
+	//printf("fourth arg: %s\n", va_arg(curr_arg, char*)); */
+
+}