How do I use pointers to access and use different values in a function?

Question

I need help with using pointers to access 2 different values from the function I created. I would need these values for certain calculations in a separate function.

I have tried introducing a pointer in the function and assigning the inductance to it. But it's not printing anything.

This is my initial code before adding in the pointers.

 double values(double, double);

 int main(void)
 {
  values(a,b);

  system("PAUSE");

  return 0;

 }

 double values(double inductance, double capacitance)   
 {
   //a = inductance; b = capacitance

   printf("Please insert the inductance value (in mH):\n");
   scanf("%lf", &inductance);



  printf("Please insert the capacitance value (in microFarads):\n");
  scanf("%lf", &capacitance);

  printf("\n");
  }

This is one of the things I tried. I tried several others. But I ended up confusing myself even more.

  double values(double *inductance) 
  {

  double induct;

   printf("Please insert the inducatance value (in mH):\n");
   scanf("%lf", induct);

   *inductance = induct;

   //   printf("\n \n %p", induct);

    printf("\n");
   }

Possible duplicate of Pointers as function arguments in C

Simon Doppler
– Simon Doppler

2019-03-24 13:27:27 +00:00
Commented Mar 24, 2019 at 13:27 — Simon Doppler
– Simon Doppler, Commented Mar 24, 2019 at 13:27
scanf("%lf", induct); --> scanf("%lf", &induct);

Achal
– Achal

2019-03-24 13:31:38 +00:00
Commented Mar 24, 2019 at 13:31 — Achal
– Achal, Commented Mar 24, 2019 at 13:31

One Man Crew · Accepted Answer · 2019-03-24 13:39:14Z

1

double values(double);

 int main(void)
 {
  double a;
  values(&a);//<----Send a Pointer of the var(the address of )

  system("PAUSE");

  return 0;

 }

double values(double *inductance) //<----change the var value by pointer.
{

   printf("Please insert the inducatance value (in mH):\n");
   scanf("%lf", inductance );

   printf("\n");
}

edited Mar 24, 2019 at 13:39

answered Mar 24, 2019 at 13:31

One Man Crew

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