运行 ID: 101587

Main.cc: In function ‘int main()’:
Main.cc:9:3: error: ‘a’ was not declared in this scope
   a[n]++;
   ^
Main.cc:12:5: error: expected ‘(’ before ‘{’ token
  for{int i=0;i<=20;i++}
     ^
Main.cc:12:5: error: expected primary-expression before ‘{’ token
Main.cc:13:2: error: expected primary-expression before ‘{’ token
  {
  ^
Main.cc:13:2: error: expected ‘;’ before ‘{’ token
Main.cc:13:2: error: expected primary-expression before ‘{’ token
Main.cc:13:2: error: expected ‘)’ before ‘{’ token
Main.cc:14:8: error: ‘a’ was not declared in this scope
  cout<