Initial data commit

Task/Sort-three-variables/D/sort-three-variables.d

@@ -0,0 +1,35 @@
+import std.stdio;
+
+void main() {
+    driver(77444, -12, 0);
+    driver("lions, tigers, and", "bears, oh my!", "(from the \"Wizard of OZ\")");
+}
+
+void driver(T)(T x, T y, T z) {
+    writeln("BEFORE: x=[", x, "]; y=[", y, "]; z=[", z, "]");
+    sort3Var(x,y,z);
+    writeln("AFTER: x=[", x, "]; y=[", y, "]; z=[", z, "]");
+}
+
+void sort3Var(T)(ref T x, ref T y, ref T z)
+out {
+    assert(x<=y);
+    assert(x<=z);
+    assert(y<=z);
+}
+body {
+    import std.algorithm : swap;
+
+    if (x < y) {
+        if (z < x) {
+            swap(x,z);
+        }
+    } else if (y < z) {
+        swap(x,y);
+    } else {
+        swap(x,z);
+    }
+    if (z<y) {
+        swap(y,z);
+    }
+}