RECURSION C PROGRAMMING

If you compile following code using the command line given in the example, there is no error.

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gcc main.c -o ll -Wall

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However, if you use g++ rather than gcc, you would get the following error:

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g++ main.c -o ll -Wall

main.c: In function 'NODE* DuplicateLinkedList(const NODE*)':

main.c:28:19: error: invalid conversion from 'void*' to 'NODE* {aka node*}' [-fpermissive]

pDupHead=malloc(sizeof(NODE));

~~~~~~^~~~~~~~~~~~~~

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Both gcc and g++ are GNU compilers. Explain what is going on here...

// compiled with gcc: // gcc main.c -o ll -Wall // // output of: ./ll // 0 // 1 // 2 // ===================================================================== #include  #include  #include  struct node{ int nValue; struct node *pNextNode; }; typedef struct node NODE; NODE *DuplicateLinkedList(const NODE *pList){ NODE *pDupHead=NULL; NODE *pN=NULL; if(pList!=NULL) { pN=DuplicateLinkedList(pList->pNextNode); pDupHead=malloc(sizeof(NODE)); pDupHead->nValue=pList->nValue; pDupHead->pNextNode=pN; } return(pDupHead); } // ===================================================================== int main(void){ NODE N0, N1, N2; NODE *pN=NULL; N0.nValue=0; N0.pNextNode=&N1; N1.nValue=1; N1.pNextNode=&N2; N2.nValue=2; N2.pNextNode=NULL; pN=DuplicateLinkedList(&N0); while(pN!=NULL) { printf("%d ", pN->nValue); pN=pN->pNextNode; } return(0); }