Compilare: user.cpp: In function ‘int main()’: user.cpp:60:45: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘int’ [-Wformat=] scanf("%d %s\n", currentlength, that); ^ user.cpp:79:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<act->where.size();++i) ^ user.cpp:48:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("virus.in", "r", stdin); ^ user.cpp:49:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("virus.out", "w", stdout); ^ user.cpp:55:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %s\n", &N, &numWords, S); ^ user.cpp:60:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %s\n", currentlength, that); ^ user.cpp:60:46: warning: ‘currentlength’ may be used uninitialized in this function [-Wmaybe-uninitialized]