How to pass several objects to a function as parameter in c++ - c++

Question

I have a class as below that its method accept an object as its parameter.
template <typename T> class Matrix{
private:
matrixNode<T>* rear=0;
std::vector<int> rows;
std::vector<int> cells;
std::vector<matrixNode<T>*> listofAddedNodes;
void generatetableRowCellArrays(int rowSize,int cellSize){
for (int i=0;i<rowSize;i++){
rows.push_back(i);
}
for (int i=0;i<cellSize;i++){
cells.push_back(i);
}
}
public:
Matrix(int rowSize,int cellSize){
generatetableRowCellArrays(rowSize,cellSize);
}
void ceateSparsMatrix(matrixNode<T> *node){
matrixNode<T> *mxNode=(matrixNode<T>*)malloc(sizeof(matrixNode<T>));
mxNode=node;
if(rear!=0){
rear->PL=(matrixNode<T>*)&rows[mxNode->line];
rear->PC=(matrixNode<T>*)&cells[mxNode->column];
}
rear=mxNode;
listofAddedNodes.push_back(mxNode);
}
void ceateSparsMatrix(matrixNode<T> node,int SpecificRow,int specificCell){
matrixNode<T> *mxNode=(matrixNode<T>*)malloc(sizeof(matrixNode<T>));
mxNode=node;
if(rear!=0){
rear->PL=&rows[SpecificRow];
rear->PC=&cells[specificCell];
}
rear=mxNode;
listofAddedNodesPointers.push_back(&rear->value);
}
void showAllAddedNodes(){
for(int i=0;i<listofAddedNodes.size();i++){
printf("|----------------------------|\n");
printf("|Value | %d |\n",listofAddedNodesPointers[i]->value);
printf("|Coll | %d |\n",listofAddedNodesPointers[i]->column);
printf("|Line | %d |\n",listofAddedNodesPointers[i]->line);
printf("|PC | %d |\n",listofAddedNodesPointers[i]->PC);
printf("|PL | %d |\n",listofAddedNodesPointers[i]->PL);
printf("|----------------------------|\n");
}
}};};
When i want to test this function , i create several objects of the "matrixNode" class and pass to the function but it doesn't work!
Matrix<int> matrix(5,6);
matrixNode<int> *matNode();
matNode->column=2;
matNode->line=0;
matNode->value=2;
matNode->PC=NULL;
matNode->PL=NULL;
matrixNode<int> *matNode2;
matNode2->column=5;
matNode2->line=5;
matNode2->value=5;
matNode2->PC=NULL;
matNode2->PL=NULL;
matrix.ceateSparsMatrix(matNode);
matrix.ceateSparsMatrix(matNode2);
It doesn't pass the objects well!
Can you please help me?
Thanks

Answer 1

You need to either dynamically allocate your matrix objects or pass pointers to existing objects.
Matrix<int> matrix(5,6);
matrixNode<int> * matNode = new matrixNode<int>;
matNode->column=2;
matNode->line=0;
matNode->value=2;
matNode->PC=NULL;
matNode->PL=NULL;
matrixNode<int> * matNode2 = new matrixNode<int>;
matNode2->column=5;
matNode2->line=5;
matNode2->value=5;
matNode2->PC=NULL;
matNode2->PL=NULL;
matrixNode<int> matNode3;
matNode3.column=5;
matNode3.line=3;
matNode3.value=17;
matNode3.PC=NULL;
matNode3.PL=NULL;
matrix.ceateSparsMatrix(matNode);
matrix.ceateSparsMatrix(matNode2);
matrix.ceateSparsMatrix(&matNode3);
This one of your issues.