Compilare: user.c: In function ‘main’: user.c:46: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’ user.c:14: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:15: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:24: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:26: 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 user.c:36: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:38: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result