Eroare de compilare: user.c: In function ‘functie’: user.c:28:8: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.c: At top level: user.c:68:6: warning: return type of ‘main’ is not ‘int’ [-Wmain] void main() ^ user.c: In function ‘main’: user.c:74:2: warning: implicit declaration of function ‘_getch’ [-Wimplicit-function-declaration] _getch(); ^ /tmp/ccPYVj3K.o: In function `main': user.c:(.text.startup+0x20): undefined reference to `_getch' collect2: error: ld returned 1 exit status