Compilare: user.cpp: In function ‘int functie(char*)’: user.cpp:10:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(a);j++) ^ user.cpp: In function ‘int main()’: user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);i++) ^ user.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s) && ok==0;i++) ^