Compilare: user.cpp: In function ‘void read()’: user.cpp:33:27: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000000]’ [-Wformat=] fscanf(in, "%s", &pattern); ^ user.cpp:34:21: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000000]’ [-Wformat=] fscanf(in, "%s", &s); ^ user.cpp: In function ‘int update(int, int, char*)’: user.cpp:53:6: warning: unused variable ‘aux’ [-Wunused-variable] int aux; ^ user.cpp: In function ‘void read()’: user.cpp:33:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s", &pattern); ^ user.cpp:34:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s", &s); ^