#include <iostream>#include <string>#include <cstdlib>	// rand()#include <ctime>using namespace std;// In my opinion the defines don't add much, but if you// really want them, declare them as const std::strings.// The globals you had here don't need to be global. In// fact, some of them are not needed at all./* GuessNumber(int number, int n)   Compare the number n with the number computer "thought" of and return a comparative answer   Return value:   ( -1 ) if the number is too low,    ( 1 ) if the number is too high or    ( 0 ) if the numbers match */int GuessNumber(int number, int n){  if (n > number)	  return 1;  else if (n < number)	  return -1;  return 0;  // Note that because of the way the return value is used later  // on, it doesn't matter if the function returns 1 or -1, it  // can be any number that's larger or smaller than 0, so you  // can just do this:  // return n - number;}/* InitGame()    Let the computer pick a random number */void InitGame(){  cout << "InitGame()..." << endl;    // The cast to unsigned removes a compiler warning  srand((unsigned)time(NULL));  // Moving the rand() call to Play() allows us  // to get rid of a global ('number' in your code)  // so it's worth doing}/* Play()    This is where gameplay takes place */void Play(){	cout << "Play(): " << endl;	cout << "Computer: I have thought of a number between 0 and 100. Can you guess it?" << endl;        cout << "Please enter the number below." << endl;	// This is only needed here so it doesn't need to be	// declared globaly.	// Prefer const to #define, it's type-safe and it's scoped -	// if we #defined this in here, it would still be visible in	// the entire file, but with const it's only visible in this	// function.        const int NUMBER_OF_TRIES  = 5;	// You should only declare variables when you are about	// to use them and can initialize them to a valid value		// Also, rand() % 100 return a number in [0, 99] inclusive.	// If you want [0, 100], you need to write:	int number = rand() % 101;	// A for loop is more convinient here	for (int i = NUMBER_OF_TRIES; i > 0; --i) {                cout << "You have " << i << " tries left" << endl;		int guess;		cin >> guess;                // In your code, this variable was called 'answer', but		// the return value is not the answer the user entered,		// it's a classification of the answer, therefore you		// should pick a different name (thogh mine isn't much better :)		int c = GuessNumber(number, guess);				if (c == 0) {			cout << "CONGRATULATIONS, You won, the number " << guess << " is correct!" << endl;			return;		}		// We are returning from the if, so an else clause is not needed		if (c > 0)			cout << "Computer: The number you entered is too high" << endl;		else			cout << "Computer: The number you entered is too low" << endl;	}	cout << "SORRY YOU LOST, The number I thought of was " << number << endl;}/* Destroy()    This is where we would destroy allocated memory, etc.   Because Guess is a very simple game, we have nothing to do here,   But this would be an important step in an advanced computer game */void Destroy(){  cout << "DestroyGame()" << endl;}/* int main()   Program entry point */// You're not using argc and argv, so there's no need to// introduce them.int main(){  InitGame();    Play();    Destroy();	  // In C++, if main() doesn't return a value, 0 is returned  // automatically.}