View Compilation Error

0_0_20422233_8096.cpp:46:5: error: expected initializer before 'while'
     while (~scanf("%d", &n)) {
     ^
0_0_20422233_8096.cpp:53:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_20422233_8096.cpp:54:1: error: expected declaration before '}' token
 }
 ^