Compilare: user.cpp: In function ‘void read_input(char*)’: user.cpp:162: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:169: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main(int, char**)’: user.cpp:175: warning: deprecated conversion from string constant to ‘char*’ user.cpp:176: warning: deprecated conversion from string constant to ‘char*’