Compilare: user.cpp: In function ‘void getPrefix()’: user.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 1; j<strlen(A); j++ ) ^ user.cpp: In function ‘int main()’: user.cpp:39:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < strlen(B); j++ ) ^ user.cpp:46:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( i == strlen(A) ) ^