Data update

Task/Caesar-cipher/Zig/caesar-cipher.zig

@@ -0,0 +1,23 @@
+const std = @import("std");
+const stdout = @import("std").io.getStdOut().writer();
+
+pub fn rot(txt: []u8, key: u8) void {
+    for (txt, 0..txt.len) |c, i| {
+        if (std.ascii.isLower(c)) {
+            txt[i] = (c - 'a' + key) % 26 + 'a';
+        } else if (std.ascii.isUpper(c)) {
+            txt[i] = (c - 'A' + key) % 26 + 'A';
+        }
+    }
+}
+
+pub fn main() !void {
+    const key = 3;
+    var txt = "The five boxing wizards jump quickly".*;
+
+    try stdout.print("Original:  {s}\n", .{txt});
+    rot(&txt, key);
+    try stdout.print("Encrypted: {s}\n", .{txt});
+    rot(&txt, 26 - key);
+    try stdout.print("Decrypted: {s}\n", .{txt});
+}