From 0f61f6bd3d62a8dac9b9c03270f5878aa5f44588 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Fri, 17 Jan 2025 00:43:20 +0800
Subject: [PATCH] feat: update single files compile error

---
 single_files/for.zig       | 2 +-
 single_files/optionals.zig | 6 +++---
 single_files/while.zig     | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/single_files/for.zig b/single_files/for.zig
index 08f18a8..15585b3 100644
--- a/single_files/for.zig
+++ b/single_files/for.zig
@@ -2,7 +2,7 @@ const print = @import("std").debug.print;
 
 pub fn main() void {
   const string = [_]u8{ 'a', 'b', 'c' };
-  for (string) |character, index| {
+  for (string, 0..) |character, index| {
     print("{} - {}\n", .{index, character});
   }
 }
diff --git a/single_files/optionals.zig b/single_files/optionals.zig
index 7fa6456..6c184f5 100644
--- a/single_files/optionals.zig
+++ b/single_files/optionals.zig
@@ -1,7 +1,7 @@
 const print = @import("std").debug.print;
 
 pub fn main() void {
-  var a: ?i32 = null;
-  var b = a orelse 1;
-  print("{} {} \n", .{a, b});
+  const a: ?i32 = null;
+  const b = a orelse 1;
+  print("{?} {} \n", .{a, b});
 }
diff --git a/single_files/while.zig b/single_files/while.zig
index b423af5..48aa2c8 100644
--- a/single_files/while.zig
+++ b/single_files/while.zig
@@ -4,7 +4,7 @@ const print = std.debug.print;
 pub fn main() void {
   var sum: i32 = 0;
   var i: i32 = 0;
-  while (i <100) : (i += 1) {
+  while (i < 100) : (i += 1) {
     sum += i;
   }
   print("Sum: {}\n", .{sum});