与C交互 #

const std = @import("std");
const c = @cImport({
    @cInclude("stdio.h");
});

pub fn main() void {
    _ = c.printf("Hello from C!\n");
}

const std = @import("std");
const c = @cImport({
    @cInclude("stdlib.h");
    @cInclude("string.h");
});

pub fn main() void {
    const size: usize = 100;
    const ptr = c.malloc(size);
    defer c.free(ptr);
    
    _ = c.memset(ptr, 0, size);
    
    std.debug.print("Allocated {} bytes\n", .{size});
}

const std = @import("std");
const c = @cImport({
    @cInclude("stdint.h");
});

pub fn main() void {
    const c_int: c_int = 42;
    const zig_int: i32 = c_int;
    
    const c_size: usize = 100;
    const zig_usize: usize = c_size;
    
    std.debug.print("c_int: {}, zig_int: {}\n", .{ c_int, zig_int });
}

const std = @import("std");

pub fn build(b: *std.Build) void {
    const exe = b.addExecutable(.{
        .name = "myapp",
        .root_source_file = b.path("src/main.zig"),
        .target = b.standardTargetOptions(.{}),
        .optimize = b.standardOptimizeOption(.{}),
    });
    
    exe.linkSystemLibrary("c");
    exe.linkSystemLibrary("m");
    
    b.installArtifact(exe);
}

const std = @import("std");

export fn add(a: i32, b: i32) i32 {
    return a + b;
}

export fn greet(name: [*:0]const u8) void {
    std.debug.print("Hello, {s}!\n", .{std.mem.span(name)});
}