Add a bunch of code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 41 insertions, 0 deletions

diff --git a/CPP/Basics/functions.cpp b/CPP/Basics/functions.cpp
new file mode 100644
index 0000000..5a26992
--- /dev/null
+++ b/CPP/Basics/functions.cpp
@@ -0,0 +1,41 @@
+#include <iostream>
+
+// C++ can pass arguments are references
+
+// by value
+int square(int x)
+{
+	return x * x;
+}
+
+// swap by value (passing pointers)
+void swap(int *x, int *y)
+{
+	int temp = *x;
+	*x = *y;
+	*y = temp;
+}
+
+// Swap by reference - function overload
+void swap(int& x, int& y)
+{
+	int temp = x;
+	x = y;
+	y = temp;
+}
+
+
+int main(void) {
+
+	int a = 9, b;
+	b = square(a);
+	std::cout << "Square of a: " << b << std::endl;
+	std::cout << "A: " << a << " B: " << b << std::endl;
+	swap(&a, &b);
+	std::cout << "Swapping by addr value:" << std::endl;
+	std::cout << "New A: " << a << " New B: " << b << std::endl;
+	swap(a, b);
+	std::cout << "Swapping by reference:" << std::endl;
+	std::cout << "New A: " << a << " New B: " << b << std::endl;
+	return 0;
+}