Eroare de compilare: user.c: In function ‘insert’: user.c:33:3: warning: implicit declaration of function ‘itoa’ [-Wimplicit-function-declaration] itoa(rasp, s, 10); ^ user.c:40:3: warning: pointer targets in passing argument 1 of ‘strcat’ differ in signedness [-Wpointer-sign] strcat(buff1, s); ^ In file included from /usr/include/features.h:357:0, from /usr/include/stdio.h:28, from user.c:1: /usr/include/i386-linux-gnu/bits/string3.h:142:1: note: expected ‘char * restrict’ but argument is of type ‘signed char *’ __NTH (strcat (char *__restrict __dest, __const char *__restrict __src)) ^ user.c: In function ‘next’: user.c:14:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, BUFF_SIZE, 1, fin); ^ /tmp/ccRlcsuT.o: In function `main': user.c:(.text.startup+0x7ce): undefined reference to `query' user.c:(.text.startup+0x900): undefined reference to `itoa' user.c:(.text.startup+0xada): undefined reference to `start' user.c:(.text.startup+0xaf5): undefined reference to `start' user.c:(.text.startup+0xb44): undefined reference to `start' user.c:(.text.startup+0xb63): undefined reference to `start' user.c:(.text.startup+0xbc9): undefined reference to `start' /tmp/ccRlcsuT.o:user.c:(.text.startup+0xbe8): more undefined references to `start' follow collect2: error: ld returned 1 exit status