cho0h5

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>

int main() {
        int fd = open("foo.txt", O_RDWR | O_CREAT, 0644);

        if(fd < 0) {
                printf("failed\n");
                return -1;

cho0h5

#include <unistd.h>
#include <stdio.h>

int main() {
        write(0, "write 0\n", 8);
        write(1, "write 1\n", 8);
        write(2, "write 2\n", 8);

        fprintf(stdin, "fprintf stdin\n");
        fprintf(stdout, "fprintf stdout\n");

cho0h5

use libc::{write, open, close};
use libc::{O_CREAT, O_RDWR};
use libc::{c_char, c_void};

fn main() {
    let filename: *const c_char = "text.txt\0".as_ptr() as *const c_char;
    let contents: *const c_void = "hello\n".as_ptr() as *const c_void;

    unsafe {
        let fd = open(filename, O_CREAT | O_RDWR, 0o0644);

cho0h5

#include "control_light.h"
#include <stdio.h>

int turn_on(int id) {
        printf("turn on %d\n", id);

        return 0;
}

int turn_off(int id) {

cho0h5

#include "control_light.h"
#include <stdio.h>

int turn_on(int id) {
        printf("turn on %d\n", id);

        return 0;
}

int turn_off(int id) {

cho0h5

package main

import (
        "io"
        "fmt"
)

type DummyReader struct {
}

cho0h5

#include <stdio.h>
#include <unistd.h>

int main() {
        printf("PID: %d\n", getpid());

        pid_t pid = fork();
        printf("fork ret: %d\n", pid);

        return 0;

cho0h5

#include <unistd.h>
#include <stdio.h>

int main() {
        char buffer[10] = { 0, };

        int fd[2];
        if(pipe(fd) == -1) printf("pipe failed");

        printf("fd[0] == %d\n", fd[0]);

cho0h5

#include <stdio.h>
#include <unistd.h>

int main() {
        char buf[] = "dummy string\n";

        write(1, buf, 14);      // write to stdout

        int duplicated_fd = dup(1);
        printf("duplicated fd: %d\n", duplicated_fd);

cho0h5

.data
msg:
        .ascii  "hello, world\n"
len = . - msg

.text

.global _start
_start:
        mov x0, #1