线形表a、b为两个有序升序的线形表，编写一程序，使两个有序线形表合并成一个有序升序线形表h

New Topic (Press Shift-Enter to insert a line break. Press Enter to add a paragraph return.) linklist *unio(linklist *p,linklist *q){
linklist *R,*pa,*qa,*ra;
pa=p;
qa=q;
R=ra=p;
while(pa->next!=NULL&&qa->next!=NULL){
if(pa->data>qa->data){
ra->next=qa;
qa=qa->next;
}
else{
ra->next=pa;
pa=pa->next;
}
}
if(pa->next!=NULL)
ra->next=pa;
if(qa->next!=NULL)
ra->next==qa;
return R;
}