View Compilation Error

0_0_35316175_30260.c: In function 'main':
0_0_35316175_30260.c:4:32: error: 'EOF' undeclared (first use in this function)
  while((scanf("%d %d",&A,&B))!=EOF&&(A||B))
                                ^
0_0_35316175_30260.c:4:32: note: each undeclared identifier is reported only once for each function it appears in