//online parser:
https://www.bccn.net/run/
void exit(int status);
int system(const char *command);
int printf(const char *format, ...);
int mian(int argc, char *argv[])
{
printf("world hello!\n");
exit(0);
}
int main(int argc, char *argv[])
{
system("gcc -o v.out -nostartfiles -e mian *.c");
system("ls");
system("./v.out");
return 0;
}