Compilare: user.c: In function ‘aloc_memorie’: user.c:8: warning: implicit declaration of function ‘malloc’ user.c:8: warning: incompatible implicit declaration of built-in function ‘malloc’ user.c: In function ‘read’: user.c:23: warning: ‘return’ with no value, in function returning non-void user.c:26: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:29: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘main’: user.c:57: warning: ‘a’ is used uninitialized in this function