Eroare de compilare: user.c:4:1: error: unknown type name ‘using’ using namespace std; ^ user.c:4:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘std’ using namespace std; ^ user.c:11:14: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token void cit(int &x) ^ user.c: In function ‘main’: user.c:31:2: warning: implicit declaration of function ‘cit’ [-Wimplicit-function-declaration] cit(n); cit(m); cit(k); cit(l); ^ user.c:40:5: warning: implicit declaration of function ‘itoa’ [-Wimplicit-function-declaration] itoa(i,v,10);//printf("%d\n",i); //g<<i<<'\n'; ^