英文:
How to print a number as hexadecimal in Zig?
问题
pub fn main() void {const foo: u8 = 128;std.debug.print("{}\n", .{foo}); // "128"}
The above prints 128 as expected.
How can the value be printed as hexadecimal instead?
英文:
const std = @import("std");pub fn main() void {const foo: u8 = 128;std.debug.print("{}\n", .{foo}); // "128"}
The above prints 128 as expected.
How can the value be printed as hexadecimal instead?
答案1
得分: 1
将`x`或`X`放入大括号中。还有其他选项：```zigconst std = @import("std");pub fn main() void {// 在 Zig v0.10.1 中测试过const foo: u8 = 26;std.debug.print("0x{x}\n", .{foo}); // "0x1a"std.debug.print("0x{X}\n", .{foo}); // "0x1A"const bar: u16 = 1;std.debug.print("0x{x}\n", .{bar}); // "0x1"std.debug.print("0x{x:2}\n", .{bar}); // "0x 1"std.debug.print("0x{x:4}\n", .{bar}); // "0x 1"std.debug.print("0x{x:0>4}\n", .{bar}); // "0x0001"const baz: u16 = 43;std.debug.print("0x{x:0>4}\n", .{baz}); // "0x002b"std.debug.print("0x{X:0>8}\n", .{baz}); // "0x0000002B"const qux: u32 = 0x1a2b3c;std.debug.print("0x{X:0>2}\n", .{qux}); // "0x1A2B3C"（不截断）std.debug.print("0x{x:0>8}\n", .{qux}); // "0x001a2b3c"}
有关占位符的更多信息，请参阅 https://github.com/ziglang/zig/blob/master/lib/std/fmt.zig
<details><summary>英文:</summary>Put `x` or `X` inside the curly brackets.There are additional options as well:```zigconst std = @import("std");pub fn main() void {// Tested with Zig v0.10.1const foo: u8 = 26;std.debug.print("0x{x}\n", .{foo}); // "0x1a"std.debug.print("0x{X}\n", .{foo}); // "0x1A"const bar: u16 = 1;std.debug.print("0x{x}\n", .{bar}); // "0x1"std.debug.print("0x{x:2}\n", .{bar}); // "0x 1"std.debug.print("0x{x:4}\n", .{bar}); // "0x 1"std.debug.print("0x{x:0>4}\n", .{bar}); // "0x0001"const baz: u16 = 43;std.debug.print("0x{x:0>4}\n", .{baz}); // "0x002b"std.debug.print("0x{X:0>8}\n", .{baz}); // "0x0000002B"const qux: u32 = 0x1a2b3c;std.debug.print("0x{X:0>2}\n", .{qux}); // "0x1A2B3C" (not cut off)std.debug.print("0x{x:0>8}\n", .{qux}); // "0x001a2b3c"}
You can read more about the placeholders at https://github.com/ziglang/zig/blob/master/lib/std/fmt.zig
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