Compilare: user.cpp: In function ‘int main()’: user.cpp:23:25: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int i, j, k, l, la, nr, m, q; ^ user.cpp:23:29: warning: unused variable ‘m’ [-Wunused-variable] int i, j, k, l, la, nr, m, q; ^ user.cpp:24:11: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] char *p; ^ user.cpp: In function ‘void Prefix(char*)’: user.cpp:88:19: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while ( q > 0 & A[q + 1] != A[i] ) ^