Compilare: user.c: In function 'afisare': user.c:34: warning: implicit declaration of function 'memset' user.c:34: warning: incompatible implicit declaration of built-in function 'memset' user.c: In function 'solve': user.c:75: warning: implicit declaration of function 'memcpy' user.c:75: warning: incompatible implicit declaration of built-in function 'memcpy' user.c:91: warning: incompatible implicit declaration of built-in function 'memcpy' user.c:100:2: warning: no newline at end of file