View Compilation Error

1_868_7315_25269.cpp: In function 'int main()':
1_868_7315_25269.cpp:31:13: error: 'n' was not declared in this scope
  while (~sc(n))
             ^
1_868_7315_25269.cpp:16:27: note: in definition of macro 'sc'
 #define sc(n) scanf("%d",&n)
                           ^