Assembly Language Programming

Homework 2

Modify the game (Fig 5.8) to use unsigned 16-bit integers for all of the guessing. The user may enter numbers in the range 0 through 65535. Use the atoi and itoa macros for IO. Let me know if you have problems.

Convert this to assembly language (use 32-bit integers):
  unsigned int a, b;
  cout << "Enter two positive numbers: ";
  cin >> a >> b;
  unsigned int gcd=a, rem=b;
  while (rem != 0){
    unsigned int d = gcd;
    gcd = rem;
    rem = d % gcd;
  }
  cout << "The gcd of " << a << " and " << b << " is " << gcd;

Convert this to assembly language:
  char x;
  do {
    unsigned int v = 0;
    cout << "Enter a binary number (max 32 bits): ";
    do {//you may need to input a string and process digits from memory
      cin >> x;
      if (x!='0' && x!= '1') break;
      x -= '0';
      v = v*2 + x;
    }while(true); //<<<<<<<<<<<<<<forgot the infinite loop condition
    cout << "You entered " << v << "\n";
    cout << "Play again? (y/n): ";
    cin >> x;
  }while (x == 'y');

Translate to assembly:
  const int S=10000; //try different values of S
  unsigned char p[S] = {0};
  int n=2;
  while (n<S){
    if (p[n]==0)
      for (int i=2*n; i<S; i+=n)  p[i]=1;
    n++;
  }
  int count = 0;
  for (int j=2; j<S; j++)
    if (p[j]==0){
      count++;
      cout << j << endl; //<<<<<<<<this line was corrected
    }
  cout << count << " values displayed\n";