Multiplying variables in a c program the end result comes up as <null>

[Josh Nako]

So I have this program to calculate the types of meat, I have fixed the system errors but the actual program when I run it comes up with <null> what am I doing wrong?

#include <stdio.h>
#include <stdlib.h>
#define beef     1 /* multiplication factor of beef*/
#define chicken  1.5 /*factor of chicken*/
#define pork     2 /* factor of pork*/
#define s1   0.5 /* state1 is close to expiry*/
#define s2   1 /*state2 is frozen storage*/
#define s3   1.5 /*state3 is fresh*/


int main(int argc, char *argv[])
{
  float x = 0; /*amount of meat*/  
  char y = 0; /*state of meat*/
  char z = 0; /*type of meat*/
  float w = 0; /*total price*/
  
  printf ("This program calculates price of meat. \n");
  printf ("\n Please enter type of meat ( a, b, c):");
  fflush (stdin);
  scanf ("%s",&z);
  if ((z != beef) || (z != chicken) || (z != pork))
  w, "NA";
  printf ("\n Please enter state of z(s1, s2, s3):");
  fflush (stdin);
  scanf ("%s",&st);
  if ((y != s1) || (y != s2) || (y != s3))
  w, "NA";
  printf ("\n Please enter quantity of grams of z (0 - 2000):");
  fflush (stdin);
  scanf ("%d",&x);
  if ((x < 0 ) || (x > 2000))
  price, "NA";
  else if (x >= 1500)
  price = (z*y)*8;
  else if (x >= 1000)
  price = (z*y)*6;
  else if (x >= 500)
  price = (z*y)*4;
  else
  price = (meat*st)*2;
  
  printf( "\n the price is: %s", price);
  
  system("PAUSE");    
  return 0;
}

[ZuK]

If you say that you ran the program then it must have been a different version.
BTW this is not C++ ( wrong forum )
Kurt

[Josh Nako]

Sorry, my bad, I didn't notice that. Thank you