View Compilation Error

0_0_23198679_6025.c: In function 'main':
0_0_23198679_6025.c:5:24: error: 'EOF' undeclared (first use in this function)
  while(scanf("%d",&n)!=EOF)
                        ^
0_0_23198679_6025.c:5:24: note: each undeclared identifier is reported only once for each function it appears in