Compilare: user.c: In function ‘produs’: user.c:50:3: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(aux, 0, sizeof aux); ^ user.c:50:3: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default] user.c: In function ‘main’: user.c:126:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, MAXL, in); ^