Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:11:13: warning: unused variable ‘vecin’ [-Wunused-variable] int nod,vecin,poz,i; ^~~~~ user.cpp:11:23: warning: unused variable ‘i’ [-Wunused-variable] int nod,vecin,poz,i; ^ user.cpp: In function ‘int main()’: user.cpp:40:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d\n",&n,&m,&s); ^ user.cpp:43:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^