Compilare: user.cpp: In function ‘void read()’: user.cpp:14:9: warning: unused variable ‘i’ [-Wunused-variable] int x,y,i,cost,m; ^ user.cpp: In function ‘void BF()’: user.cpp:43:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (!viz[i]) if (contor[i]>n) circneg=1; ^ user.cpp: In function ‘void read()’: user.cpp:13:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.in","r",stdin); ^ user.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:19:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&cost); ^ user.cpp: In function ‘void afis()’: user.cpp:55:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.out","w",stdout); ^