Eroare de compilare: user.cpp:8: error: expected constructor, destructor, or type conversion before ‘=’ token user.cpp:9: error: expected constructor, destructor, or type conversion before ‘=’ token user.cpp: In function ‘void back()’: user.cpp:30: error: expected ‘)’ before ‘;’ token user.cpp:30: error: expected primary-expression before ‘)’ token user.cpp:30: error: expected ‘;’ before ‘)’ token user.cpp: In function ‘int main()’: user.cpp:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result