Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:16:13: warning: unused variable ‘vec’ [-Wunused-variable] int nod,vec,mm,drm; ^~~ user.cpp:16:20: warning: variable ‘drm’ set but not used [-Wunused-but-set-variable] int nod,vec,mm,drm; ^~~ user.cpp: In function ‘int main()’: user.cpp:41:21: warning: unused variable ‘k’ [-Wunused-variable] int n,m,i,s,x,y,k=0; ^ user.cpp:42:36: 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:45:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^ user.cpp: In function ‘void BFS(int)’: user.cpp:28:19: warning: array subscript is above array bounds [-Warray-bounds] mm=t[1][mm]; ~~~^ user.cpp: In function ‘int main()’: user.cpp:47:12: warning: array subscript is above array bounds [-Warray-bounds] t[1][i]=start[x]; ~~~^