Compilare: user.cpp: In function ‘int main()’: user.cpp:13:31: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000000]’ [-Wformat=] fscanf(f, "%s\n%s", &a, &b); ^ user.cpp:13:31: warning: format ‘%s’ expects argument of type ‘char*’, but argument 4 has type ‘char (*)[2000000]’ [-Wformat=] user.cpp:13:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s\n%s", &a, &b); ^