Compilare: user.cpp: In function ‘void start_generating(const int&)’: user.cpp:26:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] cst[nr][++cst[nr][0]]=i; ^ user.cpp: In function ‘void dijkstra()’: user.cpp:114:65: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(unde[adj[nod][j]]<=ps&&dist[nod]+cost[cst[nod][j]]<dist[adj[nod][j]]) ^ user.cpp:116:61: warning: array subscript has type ‘char’ [-Wchar-subscripts] dist[adj[nod][j]]=dist[nod]+cost[cst[nod][j]]; ^ user.cpp: In function ‘int main()’: user.cpp:136:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("boom.in","r",stdin); ^ user.cpp:137:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("boom.out","w",stdout); ^ user.cpp: In function ‘void read()’: user.cpp:11:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:14:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&cost[i],&cam[i][0]); ^ user.cpp:17:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&cam[i][j]); ^