Compilare: user.cpp: In function ‘int reinitializare_copie(int)’: user.cpp:37: warning: no return statement in function returning non-void user.cpp: In function ‘int back(int)’: user.cpp:65: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:74: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:81: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:83: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result