Eroare de compilare in evaluator: user.c: In function 'main': user.c:28: warning: pointer targets in assignment differ in signedness user.c:55: warning: format '%d' expects type 'int', but argument 2 has type 'long unsigned int' user.c:57: warning: format '%ld' expects type 'long int', but argument 4 has type 'long long unsigned int' user.c:59: warning: implicit declaration of function 'getch' /tmp/ccpr9zdk.o: In function `main': user.c:(.text+0x1b0): undefined reference to `getch' collect2: ld returned 1 exit status