Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:87:13: warning: unused variable ‘cost’ [-Wunused-variable] int cost = Heap[1].cost; ^ user.cpp: In function ‘int main()’: 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 ("dbz.in" ,"r", stdin ); ^ user.cpp:138:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("dbz.out","w", stdout); ^ user.cpp:140:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &nrNodes, &nrEdges); ^ user.cpp:144:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &node1, &node2, &cost); ^