View Compilation Error

0_0_18463496_17774.cpp:4:2: error: expected primary-expression before 'int'
  int a, b;
  ^
0_0_18463496_17774.cpp:4:2: error: expected '}' before 'int'
0_0_18463496_17774.cpp:4:2: error: expected ',' or ';' before 'int'
0_0_18463496_17774.cpp:5:2: error: expected unqualified-id before 'while'
  while (scanf("%d%d", &a, &b) != EOF)
  ^
0_0_18463496_17774.cpp:9:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_18463496_17774.cpp:10:1: error: expected declaration before '}' token
 }
 ^