Initial commit with kinda crappy unnumbered examples

1 files changed, 46 insertions, 0 deletions

diff --git a/polymorphism.cpp b/polymorphism.cpp
new file mode 100644
index 0000000..89f5005
--- /dev/null
+++ b/polymorphism.cpp
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+#include <iostream> 
+
+// here we have a bunch of structures to represent
+// 3 dimensional math vectors, one with integer values
+// and another with double precision floating point values
+struct vec3i {
+    int x;
+    int y;
+    int z;
+};
+
+struct vec3d {
+    double x;
+    double y;
+    double z;
+};
+
+// and we define the dot product operation
+int dot(vec3i v, vec3i w) {
+    return v.x * w.x + v.y * w.y + v.z * w.z;
+}
+
+// notice that this function is also called dot() like the one above
+// the difference is in the return value and the arguments
+// this functions is said to *overload* the one before
+double dot(vec3d v, vec3d w) {
+    return v.x * w.x + v.y * w.y + v.z * w.z;
+}
+
+
+int main(int argc, char *argv[]) {
+
+    vec3i a = { 1, 2, 3 };
+    vec3i b = { 1, 2, 3 };
+    // lets use our data and functions
+    std::cout << dot(a, b) << std::endl;
+
+    vec3d c = { .5, .2, 11.2 };
+    vec3d d = { .2, .2, 12.3 };
+
+    // notice how the compiler recognizes the type of the argument
+    // and calls the correct dot() function
+    std::cout << dot(c, d) << std::endl;
+
+    return 0;
+}