Polynomial of power of the following procedures: drop list form combined function, when the part to the red words below shows that read data error, debug data found at this time for p1=??????? When should trigger the conditions in the outer while loop and jump out, but always jump out, turn to the great god why

 
Poly real * add (poly real * p1, p2) poly real * 
{
Poly real * result=nullptr; 
Poly real * result_head=nullptr; 
While (p2!=nullptr& & P1!=nullptr) 
{
If  (p1 - & gt; Times & lt; The p2 - & gt; Times)  
{
If (result!=nullptr) 
Result=result - & gt; Next=p2; 
The else result=p2; 
The p2=p2 - & gt; next; 
If (result_head==nullptr) result_head=the result; 
} 
If (p1 - & gt; Times & gt; The p2 - & gt; Times) 
{
If (result!=nullptr) 
Result=result - & gt; Next=p; 
The else result=p1; 
P1=p1 - & gt; next; 
If (result_head==nullptr) result_head=the result; 
} 
If (p1 - & gt; Times==p2 - & gt; Times) 
{
Poly real * temp=(poly real *) malloc (sizeof (poly real)); 
Temp - & gt; Coef=p1 - & gt; Coef + p2 - & gt; Coef. 
Temp - & gt; Times=p1 - & gt; Times; 
If (temp - & gt; Coef!=0) 
{
P1=p1 - & gt; next; 
The p2=p2 - & gt; next; 
If (result!=nullptr) 
Result=result - & gt; Next=temp; 
The else result=temp; 
If (result_head==nullptr) result_head=the result; 
} 
The else//if the coefficient and 0 
{
P1=p1 - & gt; next; 
The p2=p2 - & gt; next; 
} 
} 
} 
If (p1==nullptr& & The p2! Result==nullptr) result - & gt; Next=p2; 
If (p1!=nullptr & amp; & P2==nullptr) result=result - & gt; Next=p; 
If (p1==nullptr & amp; & The p2==nullptr); 
Return result_head; 
} 

Test data:
4
3 4 5 6 1-2 0
3
5 20-7 4 3 1
(original intention is to realize the power polynomial list form together)

CodePudding user response:

No value given the p2

CodePudding user response:

Hello, this does show is the p2 no value, but at this time should be morally has jumped out of the outer while loop, why will he in there?