Programming Forums - View Single Post - invalid conversion from `const IntNode*' to `IntNode*'

Yona · Jan 16th, 2006, 3:46 AM

hi,
i am working on this assignment. i have a header IntNode given and based on this header i have to make a new header InrNodeEx in which i have to make the three following functions :
-inline int list_sum(const IntNode *head)
Returns sumary of list
-inline void list_multilpy_withNumber(IntNode *head, int number)
Multiplies all elements of list with a number
-inline IntNode* list_from_multiplyWithNumber(const IntNode* source, int number)
Multiplies all elements of list with a number without changing the source list
IntNodeEx i've written is the following

(Toggle Plain Text)

#include "IntNode.h"

//Returns sumary of list 
inline int list_sum(const IntNode *head){ 
IntNode *current; 
int sum=0; 
current=head; //ERROR APPEARS HERE//
while(current){ 
sum = sum + current->data; 
current=current->getNext(); 
} 
return sum; 
} 


//Multiplies all elements of list with a number 
inline void list_multilpy_withNumber(IntNode *head, int number){ 
IntNode *current=head; 
while(current){ 
current->data=(current->data)*number; 
current=current->getNext(); 
} 
} 

//Multiplies all elements of list with a number without changing the source list 
inline IntNode* list_from_multiplyWithNumber(const IntNode* source, int number){ 
IntNode *current=source; //ERROR APPEARS HERE//
IntNode *target=0; 
while(current){ 
list_insert(&target, new IntNode((current->data)*number)); 
current=current->getNext(); 
} 
return target; 
}

the problem is that when i call the functions list_sum(const IntNode *) and list_from_multiplyWithNumber(const IntNode*, int) the compiler shows the following mistakes
In function `int list_sum(const IntNode*)':nvalid
conversion from `const IntNode*' to `IntNode*'
In function `IntNode* list_from_multiplyWithNumber(const IntNode*, int)':invalid conversion from `const IntNode*' to `IntNode*'
which is absolutely normal to happen but i really can't figure out any way to deal with these errors.

Can anybody suggest any solution?
thanx for ur time!!!!

Jan 16th, 2006, 3:46 AM	#1
Yona Newbie Join Date: Jan 2006 Posts: 2 Rep Power: 0	*invalid conversion from `const IntNode' to `IntNode'* hi, i am working on this assignment. i have a header IntNode given and based on this header i have to make a new header InrNodeEx in which i have to make the three following functions : -inline int list_sum(const IntNode head) Returns sumary of list -inline void list_multilpy_withNumber(IntNode head, int number) Multiplies all elements of list with a number -inline IntNode* list_from_multiplyWithNumber(const IntNode* source, int number) Multiplies all elements of list with a number without changing the source list IntNodeEx i've written is the following (Toggle Plain Text) #include "IntNode.h" //Returns sumary of list inline int list_sum(const IntNode head){ IntNode current; int sum=0; current=head; //ERROR APPEARS HERE// while(current){ sum = sum + current->data; current=current->getNext(); } return sum; } //Multiplies all elements of list with a number inline void list_multilpy_withNumber(IntNode head, int number){ IntNode current=head; while(current){ current->data=(current->data)number; current=current->getNext(); } } //Multiplies all elements of list with a number without changing the source list inline IntNode list_from_multiplyWithNumber(const IntNode* source, int number){ IntNode current=source; //ERROR APPEARS HERE// IntNode target=0; while(current){ list_insert(&target, new IntNode((current->data)number)); current=current->getNext(); } return target; } #include "IntNode.h" //Returns sumary of list inline int list_sum(const IntNode head){ IntNode current; int sum=0; current=head; //ERROR APPEARS HERE// while(current){ sum = sum + current->data; current=current->getNext(); } return sum; } //Multiplies all elements of list with a number inline void list_multilpy_withNumber(IntNode head, int number){ IntNode current=head; while(current){ current->data=(current->data)number; current=current->getNext(); } } //Multiplies all elements of list with a number without changing the source list inline IntNode* list_from_multiplyWithNumber(const IntNode* source, int number){ IntNode current=source; //ERROR APPEARS HERE// IntNode target=0; while(current){ list_insert(&target, new IntNode((current->data)number)); current=current->getNext(); } return target; } the problem is that when i call the functions list_sum(const IntNode ) and list_from_multiplyWithNumber(const IntNode, int) the compiler shows the following mistakes In function `int list_sum(const IntNode)':nvalid conversion from `const IntNode' to `IntNode' In function `IntNode* list_from_multiplyWithNumber(const IntNode, int)':invalid conversion from `const IntNode' to `IntNode*' which is absolutely normal to happen but i really can't figure out any way to deal with these errors. Can anybody suggest any solution? thanx for ur time!!!!