Compilare: user.cpp: In function ‘int main()’: user.cpp:15: warning: format ‘%s’ expects type ‘char*’, but argument 3 has type ‘char (*)[2000001]’ user.cpp:15: warning: format ‘%s’ expects type ‘char*’, but argument 4 has type ‘char (*)[2000001]’ user.cpp:15: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result