Eroare de compilare: user.cpp: In function ‘void posibilitate(long long unsigned int, long long unsigned int)’: user.cpp:96:15: error: ‘b’ was not declared in this scope trans(k-1,b); ^ user.cpp:97:13: error: ‘a’ was not declared in this scope trans(k,a); ^ user.cpp: In function ‘int main()’: user.cpp:120:10: warning: unused variable ‘a’ [-Wunused-variable] char a[700],b[20]; ^ user.cpp:120:17: warning: unused variable ‘b’ [-Wunused-variable] char a[700],b[20]; ^