// hw3ex.ccp 
//
// An example of a few functions in C++
//
//
//  Inputs: N (specifies number of variables)
//
// Outputs: The One (1), Zero(0), or Mask(-)
//          bits for a fixed SOP term.
//
// Example Input:
//    8
//    done
//
// Example Output:
//    0101----
//     
// To compile:
//   g++ -o hw3ex hw3ex.cpp
//
// Prof. John W Lockwood
// Washington University
// February 26, 2001
// CoE460
// http://www.arl.wustl.edu/~lockwood/class/coe460/
//

#include <stdio.h>
#include <stdlib.h>

#define DEBUG(x) 
// Define DEBUG(x) x 
// For verbose output

#define MaxLineSize 200

int n; // Number of variables in function

char linebuffer[MaxLineSize]; // Buffer to hold input

class sop_term {
  public:
    unsigned int value; // up to 32-bits: 0=false, 1=true
    unsigned int mask;  // up to 32-bits: 0=Care,  1=DontCare
  public:
    void sop_term::display_var(int i);
    void sop_term::display(int start_bit);
};


void sop_term::display_var(int i) { 
    if (( (1<<i) & mask ) != 0)
      printf("-");
    else if (( (1<<i) & value ) != 0) 
      printf("1");
    else 
      printf("0");
}

void sop_term::display(int start_bit) {
  // Recursive funciton to print SOP term.

  display_var(start_bit);

  if (start_bit > 0)
    display(start_bit - 1);
  else
    return;
  
}



int read_num() {
  int number;
  scanf("%d\n",&number);
  return number; 
}


main() {
  n=read_num();
  printf("Function has %d variables\n",n);

  sop_term myterm;
  
  myterm.value = 0x55; // 0000 .. 01010101 in binary
  myterm.mask  = 0x0F; // 0000 .. 00001111 in binary


  printf("SOP_Term Contains: \n");

  myterm.display(n-1);

}