foo.cc: In function 'int main()':
foo.cc:10:2: error: a function-definition is not allowed here before '{' token
   10 |  {
      |  ^
foo.cc: At global scope:
foo.cc:22:9: error: expected constructor, destructor, or type conversion before '(' token
   22 |   printf("总张数:%d\n" + count);
      |         ^
foo.cc:23:3: error: expected unqualified-id before 'return'
   23 |   return count;
      |   ^~~~~~

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