View Compilation Error

0_0_27125564_28266.cpp:2:7: error: expected constructor, destructor, or type conversion before '(' token
  scanf("%d",&t);
       ^
0_0_27125564_28266.cpp:3:2: error: expected unqualified-id before 'while'
  while(t--)
  ^
0_0_27125564_28266.cpp:11:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_27125564_28266.cpp:12:1: error: expected declaration before '}' token
 }
 ^