Compilare: user.cpp: In function ‘int main()’: user.cpp:15:30: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000003]’ [-Wformat=] fscanf(F, "%s %s", &a, &b); ^ user.cpp:15:30: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[2000003]’ [-Wformat=] user.cpp:15:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(F, "%s %s", &a, &b); ^