Compilare: user.cpp: In function ‘void heapup(int)’: user.cpp:29:11: warning: unused variable ‘aux’ [-Wunused-variable] int j,aux; ^ user.cpp: In function ‘int heapout()’: user.cpp:40:11: warning: unused variable ‘k’ [-Wunused-variable] int j,k,i=1; ^ user.cpp: In function ‘int main()’: user.cpp:57:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,a,b; ^ user.cpp:55:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin); ^ user.cpp:56:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out","w",stdout); ^ user.cpp:58:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:65:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a,&(auxve.nod),&(auxve.cost)); ^