Compilare: user.cpp: In function ‘int main()’: user.cpp:12: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:15: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:20: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result