Compilare: user.c: In function 'main': user.c:92: warning: format '%u' expects type 'unsigned int *', but argument 3 has type 'unsigned char *' user.c:94: warning: implicit declaration of function 'malloc' user.c:94: warning: incompatible implicit declaration of built-in function 'malloc' user.c:98: warning: pointer targets in passing argument 1 of 'fgets' differ in signedness user.c:88: warning: unused variable 'k' user.c:88: warning: unused variable 'j' user.c: In function 'patrat': user.c:13: warning: 'j' is used uninitialized in this function user.c: In function 'romb': user.c:50: warning: 'j' is used uninitialized in this function