Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:17:17: warning: unused variable ‘i’ [-Wunused-variable] int p=1,u=1,i,poz,a=0,cu; ^ user.cpp:17:23: warning: unused variable ‘a’ [-Wunused-variable] int p=1,u=1,i,poz,a=0,cu; ^ user.cpp:17:27: warning: unused variable ‘cu’ [-Wunused-variable] int p=1,u=1,i,poz,a=0,cu; ^ user.cpp: In function ‘int main()’: user.cpp:37:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&m,&s); ^ user.cpp:40:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&x,&y); ^