In [4]:

%%writefile prog.c

#include<stdio.h>

int main(void)
{
    printf("Hello World!");
    
    return 0;
}

Overwriting prog.c

In [2]:

!gcc --version

gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

In [5]:

!gcc prog.c && ./a.out

Hello World!