Problem assign float to an embed class within the Linked-list libary

Question

I have successfully implemented some code which uses a linked-list. Everything is working, except assigning a value to a float within the embeded class. When I run the code below, I get the expected behavior, a flashing LED for 10 secs then LED turns continuously ON, and I also get the debug messages I expect. However, when I comment the marked line to assign a value to the float, it still compiles, but the LED does not flash as expected and I get complete rubbish from debug. I am using codebender on Chrome, and I have tried Firefox (both given same results).

Main Sketch https://codebender.cc/sketch:175995

Example of library working https://codebender.cc/sketch:176008

Can anyone help?

typedef void(*GF)(void);
#include "LinkedList.h"
class CsC {
 public:
 float PerS;
 GF FunctionToCall;
};
LinkedList<CsC*> TaskList = LinkedList<CsC*>();
void LEDON()
{
 digitalWrite(13,HIGH);
}
void after(float interval, String intervalDescription, GF func);
void after(float interval, String intervalDescription, GF func)
{
 float multi = 1;
 if(intervalDescription == "mins") multi *= 60;
 float delayMS = multi * interval;
 CsC *c;
 //Error if either of these lines uncommented
 //c->PerS=10000;
 //c->PerS=delayMS;
 c->FunctionToCall=func;
 TaskList.add(c);
 Serial.print(".");
}
void setup()
{
 Serial.begin(9600);
 pinMode(13, OUTPUT);
 Serial.println("Start write task list");
 after(35,"secs",LEDON);
 Serial.println("Done");
 Serial.println("Start prog");
}
void loop()
{
 Serial.print("List=");
 Serial.print(TaskList.size());
 while(TaskList.size()>0){
 CsC *c=TaskList.shift();
 long timeout=millis()+10000;
 //long timeout=millis()+((long)(c->PerS*1000.0));
 while(millis()<timeout){
 //To indicate it is running, and to save time, I have used a delay here
 digitalWrite(13,HIGH);
 delay(250);
 digitalWrite(13,LOW);
 delay(250);
 }
 c->FunctionToCall();
 }
 Serial.print(".");
 Serial.println("complete");
 while(1){}
}

• Ignacio Vazquez-Abrams: Have you considered allocating memory for c?
• Cable998: I thought in c++ i did not have to allocate memory. If I did allocate memory beforehand, how would I do it?
• Ignacio Vazquez-Abrams: With the new operator. And you deallocate it with the delete operator.
• Cable998: My mistake, I will try tonight

Answer 1

One possible error is a memory leak as you did not allocate the memory to the class Try

CsC *c=new CsC();