Finished day 2 exercise - added Subtract()

.gitignore

@@ -33,3 +33,4 @@ cpp/ANSI/W1/Day2/2.4/namespace-std
 cpp/ANSI/W1/Day2/2.5/comments
 cpp/ANSI/W1/Day2/2.6/functions
 cpp/ANSI/W1/Day2/2.7/function-math
+cpp/ANSI/W1/Day2/Ex.5/function-math

cpp/ANSI/W1/Day2/Ex.5/Makefile

@@ -0,0 +1,13 @@
+CFLAGS = -std=c++03 -O2
+LDFLAGS = -lglfw -lvulkan -ldl -lpthread -lX11 -lXxf86vm -lXrandr -lXi
+
+1.1: main.cpp
+	c++ $(CFLAGS) -o function-math main.cpp $(LDFLAGS)
+
+.PHONY: test clean
+
+test: function-math
+	./function-math
+
+clean:
+	rm -f function-math

cpp/ANSI/W1/Day2/Ex.5/main.cpp

@@ -0,0 +1,30 @@
+// Demonstrate some math using a function
+#include <iostream>
+int Add( int first, int second)
+{
+    std::cout << "In Add() function, recived " << first << " and " << second << "\n";
+    return(first + second);
+}
+
+int Subtract( int first, int second)
+{
+    std::cout << "In the Subtract() Function, received " << first << " and " << second << "\n";
+    return (first-second);
+}
+
+int main()
+{
+    using namespace std;
+
+    cout << "I'm in the main() function!\n";
+    int a, b, c; // Declare some variables adding
+    cout << "Enter two numbers: ";
+    cin >> a;
+    cin >> b;
+    cout << "\nCalling Subtract() Function from main()\n";
+    c=Subtract(a,b);
+    cout << "\nBack in Main()\n";
+    cout << "c was set to:\t" << c;
+    cout << "\nExiting...\n\n";
+    return 0;
+}