Problem with "No matching constructor for initialization of 'LM35' in "main.cpp", Line: 16, Col: 27"

Question

I'm a student, learning about MBEDs. I'm using Nucleo board and the MBED online compiler. Here's my code:

LM35.h

#ifndef MBED_LM35
#define MBED_LM35
#include "mbed.h"

class LM35
{
    public:
        LM35(PinName pin);
        void mjerenje();
        
    private:
        AnalogIn _pin;
};
    
#endif

LM35.cpp

#include "LM35.h"
#include "mbed.h"

LM35::LM35(PinName pin) : _pin(pin) {}
    
float temperatura;
    
void LM35::mjerenje()
{
    Serial pc(USBTX, USBRX);
    
    temperatura = _pin.read();
    temperatura = (temperatura*5000)/10;
    pc.printf("Temperatura je %.2f stupnjeva Celzijevih.\n \r", temperatura);
    return temperatura;
}

and here's Main.cpp

#include "mbed.h"
#include "LM35.h"
    
DigitalOut led1(PC_12);
Serial pc(USBTX, USBRX);
LM35 senzor(PC_0);
    
int main()
{
    senzor.mjerenje();
         
    float temperatura2 = LM35();
    pc.printf("%f", temperatura2);
}

I'm having trouble with getting temperatura out of library and using it in main.cpp. I get following error: Error: No matching constructor for initialization of 'LM35' in "main.cpp", Line: 16, Col: 27

Can someone help me?

Answer 1

in LM35.cpp

void LM35::mjerenje()

return a float value, should be -->

float LM35::mjerenje()

in the main.cpp

 float temperatura2;
 temperatura2 = senzor.mjerenje();