Compilare: user.cpp: In function ‘int main()’: user.cpp:60: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:62: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int cauta(int)’: user.cpp:34: warning: control reaches end of non-void function