Compilare: main.cpp: In function 'int transformare_numar(char*)': main.cpp:14:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);++i){ ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:21:17: warning: unused variable 'nr' [-Wunused-variable] char s[256],nr[256]; ^~ main.cpp:22:11: warning: unused variable 'j' [-Wunused-variable] int i,j,n,d,top,number; ^ main.cpp:22:15: warning: unused variable 'd' [-Wunused-variable] int i,j,n,d,top,number; ^ main.cpp:22:17: warning: unused variable 'top' [-Wunused-variable] int i,j,n,d,top,number; ^~~