RyosukeMiyahara

#include <iostream> // cout, endl;
#include <stdio.h>  // popen, pclose

int main(void) {
  std::cout << "Caller starts" << std::endl;
  
  FILE *fp = popen("./writeTest", "r");
  pclose(fp);

  std::cout << "Caller ends" << std::endl;

RyosukeMiyahara

#include <iostream> // cout, endl
#include <unistd.h> // getpid()
#include <stdlib.h> // exit()

int main(void) {
  std::cout << "(First) Process ID is " << getpid() << std::endl;
  
  // Create child process
  int forkReturnValue = fork(); // --- Process forks here! ---

RyosukeMiyahara

#include <iostream> // cout, endl

std::string stringReplace(const std::string target,
			  const std::string from,
			  const std::string to);

// First command line argment is target string to replace
// Second command line argument is replaced to Third command line argument
int main(int argc, char *argv[]) {
  if (argc != 4) {

RyosukeMiyahara

#include <iostream> // cout, endl
#include <dirent.h> // DIR, opendir, readdir, struct dirent
#include <string.h> // strcmp
#include <errno.h>  // errno
#include <stdlib.h> // exit

bool checkDirEmpty(std::string targetDir);

int main(void) {
  std::string emptyDirPath = "emptyDir";

RyosukeMiyahara

#include<stdio.h>
#include<pthread.h> // pthread_create
#include<unistd.h>  // sleep

extern "C" {
  typedef void* (*ThreadFunc_t)(void*);
}

class Test {
private:

RyosukeMiyahara

#include <iostream>   // cout, endl
#include <sys/stat.h> // stat

int main(void) {
  struct stat statFile;
  struct stat statDirectory;
  struct stat statNothing;

  // if file/directory exists, stat() returns 0
  // if file/directory does not exist, stat() returns -1

RyosukeMiyahara

#include <iostream> // cout, endl
#include <cstdlib>  // atoi

// Convert string (char array) to integer
int main() {
  std::string string123("123"); // This is string

  // Convert string (char array) to integer using atoi
  if (std::atoi(string123.c_str()) == 123) {
    std::cout << "std::atoi(string123.c_str()) is 123(int)" << std::endl;

RyosukeMiyahara

// This program achieves LED blink on Raspberry Pi with Go lang.
// This is implemented with hard-coding and uses only main function.

package main

import (
        "fmt"
        "os"
        "time"
)