webgtx

int main() {
  int arr[5] = {3, 5, 4, 7}, idx;
  for (idx = 0; idx < 5; idx++)
    printf("item addr: %i | %p \n", *(arr + idx) ,arr + idx);
  return 0;
}

webgtx

void matrix() {
  char mtx[2][3] = {{"mat"}, {"rix"}};
  mtx[1][1] = '1';
  for (int i = 0; i < 2; i++) {
    printf("%i)idx: [%c] [%c] [%c]\n", i, mtx[i][0], mtx[i][1], mtx[i][2]);
  }
  printf("\tsizeof arr = %i bytes\n", sizeof(mtx));
}

webgtx

void wrt_file(char * dat, char * filename) { 
  FILE *file = fopen(filename, "w");
    fprintf(file, dat);
  fclose(file);
}

void rd_file(char * filename, char * file_str) {
  int c;
  int idx = 0;
  FILE *file;

webgtx

void lnrd(char * str) {
  int idx = 0;
  while (true) {
    char ch = getchar();
    if (ch == '\n') 
      break;
    str[idx] = ch;
    idx++;
  }
  str[idx++] = '\0';

webgtx

struct author {
  int age;
  char uname[80];
  char stack[80];
};

struct author new_developer() {
  struct author new;
  printf("Username: ");
  lnrd(new.uname);

webgtx

// Only INT, don't trying use arrays with char
void foreach(int *arr, int len, void (*callback) (int item, int idx)) {
  unsigned idx = 0;
  for (idx; idx < len; idx++) 
    callback(arr[idx], idx);
}
int main() {
  int arr[] = {1, 3, 5, 6};
  int arr_len = sizeof arr / sizeof arr[0];
  void cb (int n, int idx) {

webgtx

int system(const char *shell);
int main() {
  system("whoami");
}

webgtx

int main() {
  const char str = "We do not cares ;)";
  return atoi(str);
}

webgtx

  # create the volume in advance
  docker volume create --driver local \
      --opt type=none \
      --opt device=/home/user/test \
      --opt o=bind \
      test_vol

  # create on the fly with --mount
  docker run -it --rm \
    --mount type=volume,dst=/container/path,volume-driver=local,volume-opt=type=none,volume-opt=o=bind,volume-opt=device=/home/user/test \

webgtx

#include <stdio.h>
#include <string.h>

// My solution
void rvrs(char * str, char * reversed_str, unsigned len) {
    str += len - 1; 
    while (str[0]) {
        *reversed_str = str[0];
        str -= 1;
        reversed_str++;