prog.c: In function �main�:
prog.c:4:10: error: �This� undeclared (first use in this function)
    4 |   printf(This sentence will produce an error.);
      |          ^~~~
prog.c:4:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:4:14: error: expected �)� before �sentence�
    4 |   printf(This sentence will produce an error.);
      |              ^~~~~~~~~
      |              )