Compilare: user.cpp: In function ‘int main()’: user.cpp:15:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<strlen(B)-strlen(A);j++) ^ user.cpp:16:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(A);i++) ^