foo.cc: In function 'Listnode* Insert(int*, int)':
foo.cc:12:5: error: expected ',' or ';' before 'int'
     int i,m=0;
     ^~~
foo.cc:13:10: error: 'i' was not declared in this scope
     for (i=0;i<n;i++){
          ^
foo.cc:15:15: error: 'm' was not declared in this scope
             b[m]=a[i]
               ^
foo.cc:21:10: error: 'i' was not declared in this scope
     for (i=0;i<m;i++){
          ^
foo.cc:21:16: error: 'm' was not declared in this scope
     for (i=0;i<m;i++){
                ^
foo.cc:25:16: error: 'insertTail' was not declared in this scope
         head = insertTail(head, t);
                ^~~~~~~~~~
foo.cc:25:16: note: suggested alternative: 'Insert'
         head = insertTail(head, t);
                ^~~~~~~~~~
                Insert
foo.cc: In function 'Listnode* insertTail(Listnode*, Listnode*)':
foo.cc:73:2: error: 'node' was not declared in this scope
  node *p = h;
  ^~~~
foo.cc:73:8: error: 'p' was not declared in this scope
  node *p = h;
        ^

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