Compilare: user.c: In function ‘citeste_Nr2’: user.c:39: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result user.c: In function ‘Scrie_Cmmdc’: user.c:49: warning: unused variable ‘a’ user.c: In function ‘cmmdc’: user.c:57: warning: suggest parentheses around comparison in operand of ‘&’ user.c: At top level: user.c:77: warning: return type of ‘main’ is not ‘int’ user.c: In function ‘cmmdc’: user.c:74: warning: control reaches end of non-void function