Compilare: user.c: In function ‘main’: user.c:13: warning: implicit declaration of function ‘malloc’ user.c:13: warning: incompatible implicit declaration of built-in function ‘malloc’ user.c:17: warning: format ‘%i’ expects type ‘int *’, but argument 3 has type ‘char *’ user.c:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:17: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:126: warning: control reaches end of non-void function