Compilare: user.c: In function ‘main’: user.c:31:22: warning: implicit declaration of function ‘strdup’ [-Wimplicit-function-declaration] token[s]=strdup(aux); ^ user.c:31:30: warning: assignment makes pointer from integer without a cast [enabled by default] token[s]=strdup(aux); ^ user.c:41:41: warning: assignment makes pointer from integer without a cast [enabled by default] token[s]=strdup(aux); ^ user.c:49:49: warning: assignment makes pointer from integer without a cast [enabled by default] token[s]=strdup(aux); ^ user.c:63:32: warning: assignment makes pointer from integer without a cast [enabled by default] token[s]=strdup(aux); ^