Compilare: user.c: In function ‘main’: user.c:28: warning: format ‘%ld’ expects type ‘long int *’, but argument 2 has type ‘long double *’ user.c:28: warning: format ‘%ld’ expects type ‘long int *’, but argument 3 has type ‘long double *’ user.c:25: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:26: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:27: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:28: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result