Compilare: user.cpp: In function ‘void bfs(int (*)[1005][1005])’: user.cpp:21:9: warning: unused variable ‘t’ [-Wunused-variable] int t,l,c,type,cost,lnou,cnou,tnou; ^ user.cpp:21:35: warning: variable ‘tnou’ set but not used [-Wunused-but-set-variable] int t,l,c,type,cost,lnou,cnou,tnou; ^~~~ user.cpp: In function ‘int main()’: user.cpp:78:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.in","r",stdin); ^ user.cpp:79:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.out","w",stdout); ^ user.cpp: In function ‘unsigned int getint()’: user.cpp:67:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ user.cpp:72:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^