/in/foo.cc: In function 'int main()':
/in/foo.cc:8:2: error: expected ',' or ';' before 'int'
  int i=0,yushu=0,num=0;
  ^~~
/in/foo.cc:9:6: error: 'i' was not declared in this scope
  for(i=1;i<=n;i++)
      ^
/in/foo.cc:14:4: error: 'yushu' was not declared in this scope
    yushu=tmp%10;
    ^~~~~
/in/foo.cc:16:5: error: 'num' was not declared in this scope
     num++;
     ^~~
/in/foo.cc:20:5: error: 'num' was not declared in this scope
     num++;
     ^~~
/in/foo.cc:22:8: error: 'num' was not declared in this scope
  cout<<num<<endl;
        ^~~
/in/foo.cc:7:6: warning: unused variable 'a' [-Wunused-variable]
  int a[9]={0}
      ^