Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:34: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void go(int)’: user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:80: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:82: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:86: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result