Eroare de compilare: user.cpp: In function ‘void back(int)’: user.cpp:53: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp: In function ‘int main()’: user.cpp:70: error: ‘i’ was not declared in this scope user.cpp:72: error: ‘rez’ was not declared in this scope user.cpp:75: error: ‘rez’ was not declared in this scope user.cpp:66: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:68: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result