Compilare: user.cpp: In function ‘void back(int, int)’: user.cpp:30:9: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if (valid(length)) //daca sir e subsir si pentru B ^~ user.cpp:36:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’ return; ^~~~~~