```c
#include
#include
#include
// Process creation with fork()
int main() {
printf("Parent: PID %d\n", getpid());
pid_t child_pid = fork();
if (child_pid == 0) {
// Child process
printf("Child: PID %d, Parent %d\n",
getpid(), getppid());
sleep(1);
printf("Child: exiting\n");
return 0;
} else if (child_pid > 0) {
// Parent process
printf("Parent: created child %d\n",
child_pid);
int status;
wait(&status);
printf("Parent: child %d done\n",
child_pid);
} else {
perror("fork");
}
return 0;
}
```
```c
#include
#include
#include
#include
// File I/O syscalls
int main() {
const char *filename = "data.txt";
const char *data = "OS Syscalls!\n";
// open() - create file for writing
int fd = open(filename,
O_CREAT | O_WRONLY | O_TRUNC,
0644);
if (fd < 0) {
perror("open");
return 1;
}
// write() - write to file
ssize_t bytes = write(fd, data,
strlen(data));
printf("Wrote %ld bytes\n", bytes);
close(fd);
// open() - reopen for reading
fd = open(filename, O_RDONLY);
char buf[64];
// read() - read from file
ssize_t n = read(fd, buf,
sizeof(buf) - 1);
buf[n] = '\0';
printf("Read: %s", buf);
close(fd);
return 0;
}
```
As you can see, details elements fully support complex HTML layouts. The flexbox container (`d-flex justify-content-between gap-3`) creates responsive multi-column layouts, while all other Markdown features (code blocks with syntax highlighting, math formulas, text styling) work seamlessly alongside the HTML structure. This enables precise formatting control for organizing rich content within collapsible sections.
### Special Characters, Escaping, and Spacing
When you need special markdown characters to appear literally, use backslashes to escape them:
- \*This would normally be italic but isn't\*
- \\This is a backslash followed by text
- \[Not a link\](