Compilare: user.cpp: In function ‘int main()’: user.cpp:15:25: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000010]’ [-Wformat=] fscanf (fin, "%s", &s1); ^ user.cpp:17:25: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000010]’ [-Wformat=] fscanf (fin, "%s", &s2); ^ user.cpp:15:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%s", &s1); ^ user.cpp:17:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%s", &s2); ^