View Compilation Error

0_0_18332580_25502.cpp:3:1: error: expected unqualified-id before 'while'
 while(scanf("%d",&n)!=EOF) {
 ^
0_0_18332580_25502.cpp:5:1: error: expected unqualified-id before 'return'
 return 0; }
 ^
0_0_18332580_25502.cpp:5:11: error: expected declaration before '}' token
 return 0; }
           ^