Eroare de compilare: user.c: In function ‘main’: user.c:23: error: ‘bool’ undeclared (first use in this function) user.c:23: error: (Each undeclared identifier is reported only once user.c:23: error: for each function it appears in.) user.c:23: error: expected ‘;’ before ‘ok’ user.c:25: error: ‘ok’ undeclared (first use in this function) user.c:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:6: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:12: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:13: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:16: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result