Compilare: user.c: In function ‘main’: user.c:51:9: warning: implicit declaration of function ‘isalpha’ [-Wimplicit-function-declaration] if(isalpha(c)) ^ user.c:63:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d",nr_car/nr_cuv); ^ user.c:43:33: warning: unused variable ‘nr’ [-Wunused-variable] long long nr_cuv=0,nr_car=0,nr; ^ user.c:8:11: warning: unused variable ‘g’ [-Wunused-variable] FILE *g=fopen("text.out","wt"); ^