Compilare: user.c: In function ‘bin’: user.c:25: warning: implicit declaration of function ‘changemat’ user.c:26: warning: implicit declaration of function ‘suma’ user.c:28: warning: implicit declaration of function ‘restoremat’ user.c: At top level: user.c:37: warning: conflicting types for ‘restoremat’ user.c:28: note: previous implicit declaration of ‘restoremat’ was here user.c: In function ‘cit’: user.c:49: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:53: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: At top level: user.c:98: warning: conflicting types for ‘changemat’ user.c:25: note: previous implicit declaration of ‘changemat’ was here user.c: In function ‘main’: user.c:118: warning: unused variable ‘j’ user.c:118: warning: unused variable ‘i’