Compilare: user.cpp: In function ‘int main()’: user.cpp:125: warning: overflow in implicit constant conversion user.cpp:131: warning: array subscript has type ‘char’ user.cpp:133: warning: array subscript has type ‘char’ user.cpp:241: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:245: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result