Compilare: user.c: In function ‘main’: user.c:18:5: warning: implicit declaration of function ‘isdigit’ [-Wimplicit-function-declaration] if(isdigit(ch)){ ^ user.c:8:20: warning: unused variable ‘n’ [-Wunused-variable] int impare = 0, i, n; ^ user.c:8:17: warning: unused variable ‘i’ [-Wunused-variable] int impare = 0, i, n; ^ user.c:22:50: warning: ‘prev’ may be used uninitialized in this function [-Wmaybe-uninitialized] }else if((ch == '\n' || ch == EOF) && isdigit(prev)){ ^