Compilare: user.cpp: In function ‘int main()’: user.cpp:22: warning: format ‘%.7lf’ expects type ‘double’, but argument 3 has type ‘int’ user.cpp:24: warning: format ‘%.7lf’ expects type ‘double’, but argument 3 has type ‘int’ user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result