//prints out the resistor information
void Node::printR() const{
Resistor *p = head;
while (p != NULL){
p->printRes();
p = p->getNext();
}
}
//insert a resistor at the end of the list
void Node::insertRes(string _name,double _resistance,int _endpoints[2]){
// now we either have p pointing to the node that already exists, or false if that doesnt exist
// if it isnt NULL, resistor with that value exists
if (head == NULL){
head = new Resistor(_name, _resistance, _endpoints);
}
else { //header is not null
Resistor* pointer = head;
while(pointer->getNext() != NULL){
pointer = pointer->getNext();
}
//create the new Resistor
//set the last element in our current list's next equal to n, the new resistor
pointer->setNext(new Resistor(_name, _resistance, _endpoints));
}
}
bool Node::isUniqueResName(string _resName){
Resistor *currRes = connectedResistors->getHead();
while(currRes != NULL){
if(currRes->getName() == _resName){
return false;
}
else
currRes = currRes->getNext();
}
//There wasn't any other resistor with the same name
return true;
}
void Node::print(){
//If this function was called, we know that the node is not empty.
//Therefore, no need to check if NULL
Resistor *currRes = connectedResistors->getHead();
while (currRes != NULL){
//For the find command, parser_find already says "Found: label....."
cout <<setw(MAX_RESISTOR_NAME_LEN)<<currRes->getName()<<" "<<setw(7)<<currRes->getResistance()<<" Ohms "
<<currRes->getNodeID(1)<<" "<<currRes->getNodeID(2)<<endl;
currRes = currRes->getNext();
}
return;
}
bool Node::searchResistorandChange(string Label, double _resistance) {
Resistor *p = head;
while (p != NULL){
//if it finds it
if (p->getName() == Label){
p->setResistance(_resistance);
return true;
}
p = p->getNext();
}
return false;
}
Resistor* Node::findResistor(string Label){
Resistor *p = head;
while (p != NULL){
//if it finds it
if (p->getName() == Label){
//return a pointer to the resistor if it was found
return p;
}
p = p->getNext();
}
//return null if not found
return NULL;
}
//crash if any resistance is 0
//helping function for solve - gets the new voltage
double NodeList:: solveHelper(Node * temp) {
Resistor *ptr = temp->getResistorList().getHead();
int nodeid = temp->nodeId;
double value1 = 0; // 1/ (1/Ra + 1/Rb + 1/Rc +.....)
double value2 = 0; // V1/Ra + V2/Rb + V3/Rc + ....
while (ptr != NULL) {
//getting the different end node of the resistor
if (ptr->getEndpoints(0) == nodeid)
value2 = value2 + (this->findOrInsert(ptr->getEndpoints(1))->voltage)/ptr->getResistance();
else if (ptr->getEndpoints(1) == nodeid)
value2 = value2 + (this->findOrInsert(ptr->getEndpoints(0))->voltage)/ptr->getResistance();
// adding all 1/resistors
value1 = value1 + (1/(ptr->getResistance()));
ptr = ptr->getNext();
}
return ((1/value1)*value2);
}
int Rparser (void){
string line, command;
int wCount;
Node *nodeList=NULL;
//start
cout << "> ";
getline(cin, line);
//Infinite loop
while(!cin.eof()){
//Get the line put it in
//how many words are there
wCount = word_per_line(line);
stringstream lineStream (line);
lineStream >> command;
if(command == "insertR"){
if(wCount > INSERT_VARIABLE_COUNT)
too_many_arguments();
else if(wCount < INSERT_VARIABLE_COUNT)
too_few_arguments();
else{
string rName;
double res;
int node1, node2;
//get resistor name
lineStream >> rName;
//check if we have the same name
bool sameResName = false;
if(nodeList==NULL)
sameResName=false;
else{
sameResName=findResName(nodeList, rName);
}
if(rName == "all"){
//error reserved word
resistor_name_all_error();
}else if(sameResName){
//rName already exists
resistor_name_exists_error(rName);
}else{
//rName is okay
//get resistance value
lineStream >> res;
if(!(lineStream.peek() == ' ')){
//error: invalid type
invalid_argument();
}else if(res < 0){
//error: res is negative
negative_resistance();
}else{
//res value is okay
lineStream >> node1;
if(!(lineStream.peek() == ' ')){
//error: invalid type
invalid_argument();
}else{
lineStream >> node2;
//checking if we have the nodes
bool haveNode1=false;
bool haveNode2=false;
if(nodeList==NULL){
haveNode1=false;
haveNode2=false;
}else{
Node *temp = nodeList;
while(temp != NULL){
if(temp->getId() == node1)
haveNode1 = true;
if(temp->getId() == node2)
haveNode2 = true;
temp = temp->getNext();
}
}
if(!haveNode1){
//creating node1
Node *newNode = new Node(node1);
nodeList->sortedInsert(nodeList, newNode);
haveNode1=true;
}
if(!haveNode2){
//creating node2
Node *newNode = new Node(node2);
nodeList->sortedInsert(nodeList, newNode);
haveNode2 = true;
}
if(node1 == node2){
//error: node numbers are same
same_node_numbers(node1);
}else if(haveNode1 && haveNode2){
//nodes are created
int endpoints[2];
endpoints[0] = node1;
endpoints[1] = node2;
Resistor *newResistor1 = new Resistor(rName, res, endpoints);
Resistor *newResistor2 = new Resistor(rName, res, endpoints);
//add resistor to node1
bool found=false;
Node *temp = nodeList;
while (temp != NULL && !found ){
if(temp->getId()== node1){
found = true;
temp->updateResNum();
temp->addResistor(newResistor1);
}else{
temp = temp->getNext();
}
}
//add resistor to node2
found = false;
temp=nodeList;
while (temp != NULL && !found ){
if(temp->getId()==node2){
found = true;
temp->updateResNum();
temp->addResistor(newResistor2);
}else{
temp = temp->getNext();
}
}
insert_resistor(rName, res, node1, node2);
}
}
}
}
}
}//END OF INSERTR
else if ( command == "modifyR"){
if(wCount > MODIFY_VARIABLE_COUNT)
too_many_arguments();
else if(wCount < MODIFY_VARIABLE_COUNT)
too_few_arguments();
else{
string rName;
//get resistor name
lineStream >> rName;
double res;
if(rName == "all"){
//error reserved word
resistor_name_all_error();
}else{
//rName is okay
//get resistance value
lineStream >> res;
if(res < 0){
//error: res is negative
negative_resistance();
}else{
//res value is okay
///MODIFY FUNC IS OKAY
double resbefore;
//look for resistor in the array
int found = 0;
Node *temp = nodeList;
while(temp != NULL && found<2){
Resistor *currentResList = temp->getResList();
while (currentResList != NULL && found<2){
if(currentResList->getName() == rName){
found++;
resbefore = currentResList->getResistance();
currentResList->setResistance(res);
}
currentResList = currentResList->getNext();
}
temp = temp->getNext();
}
//print out messages
if(found)
modify_resistor(rName,resbefore,res);
else
resistor_name_not_found(rName);
}
}
}
}//END OF MODIFYR
else if( command == "printR" ){