Compilare: user.cpp: In function ‘int main()’: user.cpp:18:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[30000001]’ [-Wformat=] fscanf (fin, "%s", &a); ^ user.cpp:20:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[3000001]’ [-Wformat=] fscanf (fin, "%s", &b); ^ user.cpp:18:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%s", &a); ^ user.cpp:20:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%s", &b); ^