Eroare de compilare: user.c: In function ‘introducere_chei’: user.c:80:9: warning: implicit declaration of function ‘strrev’ [-Wimplicit-function-declaration] token = strrev(token); ^ user.c:80:15: warning: assignment makes pointer from integer without a cast [enabled by default] token = strrev(token); ^ user.c:82:15: warning: assignment makes pointer from integer without a cast [enabled by default] token = strrev(token); ^ user.c:75:9: warning: unused variable ‘i’ [-Wunused-variable] int i, nr = 0; ^ user.c:74:19: warning: unused variable ‘token2’ [-Wunused-variable] char *token, *token2, *str; ^ user.c: In function ‘introducere_elemente’: user.c:106:15: warning: assignment makes pointer from integer without a cast [enabled by default] token = strrev(token); ^ user.c:108:15: warning: assignment makes pointer from integer without a cast [enabled by default] token = strrev(token); ^ user.c: In function ‘main’: user.c:122:29: warning: unused variable ‘chei’ [-Wunused-variable] char *string, aux[200], chei[200], trash[7] = {'[', ']', '{', '}', '"'}; ^ user.c: In function ‘creare_string’: user.c:21:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%c", &string[i]); ^ /tmp/ccUNygVk.o: In function `introducere_chei': user.c:(.text+0x1e2): undefined reference to `strrev' user.c:(.text+0x1f4): undefined reference to `strrev' /tmp/ccUNygVk.o: In function `introducere_elemente': user.c:(.text+0x2b9): undefined reference to `strrev' user.c:(.text+0x2cb): undefined reference to `strrev' collect2: error: ld returned 1 exit status