Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:12: warning: comparison between signed and unsigned integer expressions user.cpp:9: warning: unused variable ‘i’ user.cpp: In function ‘int main()’: user.cpp:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:66: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result