This is working version of a one-dimensional Battleship game. The next version should support two dimensions.
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// battleship2/main.cpp -- Version 2 of Battleship game.
// Fred Swartz, 2003-11-25
// This second version adds the following to version 1.
// * Prints coordinate along bottom edge.
// * Verifies that user bombing coordinates are good.
// * Implements bomb() function.
// * Places ship randomly on grid.
// * Checks for end of game.
//
// FUNCTIONALITY TO BE ADDED
// * Make it two-dimensional.
// * Should be a developer command to display where ships are.
//
// USER INTERFACE
// * Not robust - crashes if bombing coordinate missing.
//==================================================== includes
#include <iostream>
#include <iomanip>
#include <string>
#include <ctime> // For time()
#include <cstdlib> // For srand() and rand()
using namespace std;
//========================================= global declarations
// Damage enum defines possible values at each grid point.
enum Damage {WATER_UNBOMBED, WATER_BOMBED,
SHIP_UNBOMBED , SHIP_BOMBED};
// The display array defines what to display for
// each of the Damage enum values. Changes to the
// Damage enum require this to be changed also.
const char display[] = {'-', 'O', '-', 'X'};
const int WIDTH = 10; // Width of the grid.
Damage grid[WIDTH]; // Records status of every grid cell.
//================================================== prototypes
void dropBomb(int coord);
void executeCommand(char cmd);
void initGrid();
bool isGameOver();
void print();
//======================================================== main
int main() {
srand(time(0)); // Initialize random number generator
char ans;
do {
initGrid(); // Randomly place ships on the grid.
print();
char commandCode;
while (cin >> commandCode) {
executeCommand(commandCode);
if (isGameOver()) {
cout << "Congratuations, you win" << endl;
break;
}
}
cout << "Do you want to play again? (y/n) ";
ans = 'n';
cin >> ans;
} while (ans == 'y');
return 0;
}//end main
//======================================================= executeCommand
void executeCommand(char cmd) {
switch (cmd) {
case 'q': // quit
exit(0);
break;
case 'b': // bomb
int loc;
cin >> loc;
if (loc>=0 && loc<WIDTH) {
dropBomb(loc);
} else {
cout << "Bombing coordinate must be between 0 and " << WIDTH-1 << endl;
}
print();
break;
default: // error
cerr << "Bad input " << cmd << endl;
break;
}
}
//======================================================= dropBomb
void dropBomb(int coord) {
switch (grid[coord]) {
case WATER_UNBOMBED:
grid[coord] = WATER_BOMBED;
break;
case SHIP_UNBOMBED:
grid[coord] = SHIP_BOMBED;
break;
}
return;
}
//======================================================= initGrid
// initGrid() places random ships on the grid.
void initGrid() {
for (int i=0; i<WIDTH; i++) { // clear grid
grid[i] = WATER_UNBOMBED;
}
int start = rand() % (WIDTH-4); // Place a 3-cell ship in grid.
grid[start+0] = SHIP_UNBOMBED;
grid[start+1] = SHIP_UNBOMBED;
grid[start+2] = SHIP_UNBOMBED;
}
//========================================================== print
void print() {
cout << endl;
for (int i=0; i<WIDTH; i++) {
cout << " " << display[grid[i]];
}
cout << endl;
//-- Print coordinates.
for (int coord=0; coord<WIDTH; coord++) {
cout << setw(2) << coord;
}
cout << endl << endl;
}
//====================================================== isGameOver
bool isGameOver() {
for (int coord=0; coord<WIDTH; coord++) {
if (grid[coord] == SHIP_UNBOMBED) {
return false;
}
}
return true;
}
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