Compilare: user.cpp:16: warning: integer constant is too large for ‘long’ type user.cpp: In function ‘int main()’: user.cpp:29: warning: comparison between signed and unsigned integer expressions user.cpp:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result