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// artillery.cpp, Maggie Johnson
// Description: A simple game with a little physics
#include 
#include 
#include 
using namespace std;
 
const int kNumShells = 10;  // allowed 10 shells per target
const int kMinDist = 200;  // min distance for a target
const int kMaxDist = 900;  // max distance for a target
const double kVelocity = 200.0;  // initial velocity of 200 ft/sec
const double kGravity = 32.2;  // gravity for distance calculation
const double kPi = 3.1415;
 
// Returns the distance a shot travels given its angle.
int DistanceCalc (double in_angle) {
 
  double time_in_air;
  // The following calculates how far the shot goes given
  // its angle of projection, velocity, and how long it stays
  // in the air.
  time_in_air = (2.0 * kVelocity * sin(in_angle)) / kGravity;
  return (int) round((kVelocity * cos(in_angle)) * time_in_air);
}
 
// Get user's angle input and calculates distance where shot lands.
// Returns the distance the shot lands.
int CheckShot() {
 
  int distance;
  double angle;
  cout << "What angle? " << endl;
  if (!(cin >> angle))
    return -1;
 
  // Convert to radians.
  angle = (angle * kPi) / 180.0;
  distance =  DistanceCalc(angle);
  return distance;
}
 
// Generate a random number for the enemy position.
int Initialize() {
  int enemy_position;
 
  // Initialize random seed.
  srand (time(NULL));
 
  // Generate random number between kMinDist and kMaxDist
  enemy_position = rand() % kMaxDist + kMinDist;
  cout << "The enemy is " << enemy_position << " feet away!!!" << endl;
  return enemy_position;
}
 
// This function plays the game
int Fire(int number_killed) {
 
  int enemy, shots, hit;
  int distance;
 
  // Initialize variables.
  shots = kNumShells;
  enemy = Initialize();
  distance = 0;
  hit = 0;
 
  do {
    // Get the distance where shot lands & compare it to enemy position.
    distance = CheckShot();
    // Some error checking on the input.
    if (distance == -1) {
      cout << "Enter numbers only..." << endl;
      cin.clear();
      cin.ignore(10000,'\n');
      continue;
    }
    // Compare the enemy position with the computed distance.
    if (abs(enemy - distance) <= 1) {
      hit = 1;
      number_killed++;
      cout << "You hit him!!!" << endl;
      cout << "It took you " << kNumShells - shots + 1 <<  " shots." << endl;
      cout << "You have killed " <<  number_killed << " enemies." << endl;
    } else {
      shots--;
      if (distance > enemy) {
        cout << "You over shot by " << abs(enemy - distance) << endl;
      } else {
        cout << "You under shot by " << abs(enemy - distance) << endl;
      }
    }
  } while ((shots > 0) && (!(hit)));
  if (shots == 0)
    cout << "You have run out of ammo..." << endl;
  return number_killed;
}
 
// This shows the introductory screen.
void StartUp() {
  cout <<  "Welcome to Artillery." <> done;
  } while (done != 'n');
  cout << "You killed " << killed << " of the enemy." << endl;
}

prog.cpp:3:10: error: #include expects "FILENAME" or <FILENAME>
prog.cpp:4:10: error: #include expects "FILENAME" or <FILENAME>
prog.cpp:5:10: error: #include expects "FILENAME" or <FILENAME>
prog.cpp: In function 'int DistanceCalc(double)':
prog.cpp:22:48: error: 'sin' was not declared in this scope
   time_in_air = (2.0 * kVelocity * sin(in_angle)) / kGravity;
                                                ^
prog.cpp:23:47: error: 'cos' was not declared in this scope
   return (int) round((kVelocity * cos(in_angle)) * time_in_air);
                                               ^
prog.cpp:23:63: error: 'round' was not declared in this scope
   return (int) round((kVelocity * cos(in_angle)) * time_in_air);
                                                               ^
prog.cpp: In function 'int CheckShot()':
prog.cpp:32:3: error: 'cout' was not declared in this scope
   cout << "What angle? " << endl;
   ^
prog.cpp:32:29: error: 'endl' was not declared in this scope
   cout << "What angle? " << endl;
                             ^
prog.cpp:33:9: error: 'cin' was not declared in this scope
   if (!(cin >> angle))
         ^
prog.cpp: In function 'int Initialize()':
prog.cpp:47:15: error: 'NULL' was not declared in this scope
   srand (time(NULL));
               ^
prog.cpp:47:19: error: 'time' was not declared in this scope
   srand (time(NULL));
                   ^
prog.cpp:47:20: error: 'srand' was not declared in this scope
   srand (time(NULL));
                    ^
prog.cpp:50:25: error: 'rand' was not declared in this scope
   enemy_position = rand() % kMaxDist + kMinDist;
                         ^
prog.cpp:51:3: error: 'cout' was not declared in this scope
   cout << "The enemy is " << enemy_position << " feet away!!!" << endl;
   ^
prog.cpp:51:67: error: 'endl' was not declared in this scope
   cout << "The enemy is " << enemy_position << " feet away!!!" << endl;
                                                                   ^
prog.cpp: In function 'int Fire(int)':
prog.cpp:72:7: error: 'cout' was not declared in this scope
       cout << "Enter numbers only..." << endl;
       ^
prog.cpp:72:42: error: 'endl' was not declared in this scope
       cout << "Enter numbers only..." << endl;
                                          ^
prog.cpp:73:7: error: 'cin' was not declared in this scope
       cin.clear();
       ^
prog.cpp:78:29: error: 'abs' was not declared in this scope
     if (abs(enemy - distance) <= 1) {
                             ^
prog.cpp:81:7: error: 'cout' was not declared in this scope
       cout << "You hit him!!!" << endl;
       ^
prog.cpp:81:35: error: 'endl' was not declared in this scope
       cout << "You hit him!!!" << endl;
                                   ^
prog.cpp:87:9: error: 'cout' was not declared in this scope
         cout << "You over shot by " << abs(enemy - distance) << endl;
         ^
prog.cpp:87:65: error: 'endl' was not declared in this scope
         cout << "You over shot by " << abs(enemy - distance) << endl;
                                                                 ^
prog.cpp:89:9: error: 'cout' was not declared in this scope
         cout << "You under shot by " << abs(enemy - distance) << endl;
         ^
prog.cpp:89:66: error: 'endl' was not declared in this scope
         cout << "You under shot by " << abs(enemy - distance) << endl;
                                                                  ^
prog.cpp:94:5: error: 'cout' was not declared in this scope
     cout << "You have run out of ammo..." << endl;
     ^
prog.cpp:94:46: error: 'endl' was not declared in this scope
     cout << "You have run out of ammo..." << endl;
                                              ^
prog.cpp: In function 'void StartUp()':
prog.cpp:100:3: error: 'cout' was not declared in this scope
   cout <<  "Welcome to Artillery." <> done;
   ^
prog.cpp:100:37: error: expected primary-expression before '>' token
   cout <<  "Welcome to Artillery." <> done;
                                     ^
prog.cpp:100:39: error: 'done' was not declared in this scope
   cout <<  "Welcome to Artillery." <> done;
                                       ^
prog.cpp: At global scope:
prog.cpp:101:5: error: expected unqualified-id before 'while'
   } while (done != 'n');
     ^
prog.cpp:102:3: error: 'cout' does not name a type
   cout << "You killed " << killed << " of the enemy." << endl;
   ^
prog.cpp:103:1: error: expected declaration before '}' token
 }
 ^

Standard output is empty