#include <iostream>
#include <fstream>
#include <cstdlib>
#include <ctime>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
using namespace std;
bool gameOver;
const int width = 20;
const int height = 20;
int x, y, fruitX, fruitY, score, HS = 340;
int tailX[100], tailY[100];
int nTail;
enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN };
eDirection dir;
int kbhit(void)
{
struct termios oldt, newt;
int ch;
int oldf;
tcgetattr(STDIN_FILENO, &oldt);
newt = oldt;
newt.c_lflag &= ~(ICANON | ECHO);
tcsetattr(STDIN_FILENO, TCSANOW, &newt);
oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);
ch = getchar();
tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
fcntl(STDIN_FILENO, F_SETFL, oldf);
if(ch != EOF)
{
ungetc(ch, stdin);
return 1;
}
return 0;
}
void ClearScreen()
{
cout << "\033[2J\033[1;1H";
}
void Setup()
{
gameOver = false;
dir = STOP;
x = width / 2;
y = height / 2;
fruitX = rand() % width;
fruitY = rand() % height;
score = 0;
ifstream inFile("worldRecord.txt");
if (inFile.is_open()) {
inFile >> HS;
inFile.close();
} else {
cout << "Unable to open file for reading.";
}
}
void Draw()
{
ClearScreen();
cout << " World Record: " << HS << endl;
for (int i = 0; i < width + 2; i++)
cout << "#";
cout << endl;
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
if (j == 0)
cout << "#";
if (i == y && j == x)
cout << "O";
else if (i == fruitY && j == fruitX)
cout << "F";
else
{
bool print = false;
for (int k = 0; k < nTail; k++)
{
if (tailX[k] == j && tailY[k] == i)
{
cout << "o";
print = true;
}
}
if (!print)
cout << " ";
}
if (j == width - 1)
cout << "#";
}
cout << endl;
}
for (int i = 0; i < width + 2; i++)
cout << "#";
cout << endl;
cout << "Score: " << score << endl;
}
void Input()
{
if (kbhit())
{
switch (getchar())
{
case 'a':
dir = LEFT;
break;
case 'd':
dir = RIGHT;
break;
case 'w':
dir = UP;
break;
case 's':
dir = DOWN;
break;
case 'x':
gameOver = true;
break;
}
}
}
void Logic()
{
int prevX = tailX[0];
int prevY = tailY[0];
int prev2X, prev2Y;
tailX[0] = x;
tailY[0] = y;
for (int i = 1; i < nTail; i++)
{
prev2X = tailX[i];
prev2Y = tailY[i];
tailX[i] = prevX;
tailY[i] = prevY;
prevX = prev2X;
prevY = prev2Y;
}
switch (dir)
{
case LEFT:
x--;
break;
case RIGHT:
x++;
break;
case UP:
y--;
break;
case DOWN:
y++;
break;
default:
break;
}
if (x >= width || x < 0 || y >= height || y < 0)
gameOver = true;
for (int i = 0; i < nTail; i++)
if (tailX[i] == x && tailY[i] == y)
gameOver = true;
if (x == fruitX && y == fruitY)
{
score += 10;
if (score > HS) {
HS = score;
ofstream outFile("worldRecord.txt");
if (outFile.is_open()) {
outFile << HS;
outFile.close();
} else {
cout << "Unable to open file for writing.";
}
}
fruitX = rand() % width;
fruitY = rand() % height;
nTail++;
}
}
int main()
{
srand(time(NULL));
Setup();
while (!gameOver)
{
Draw();
Input();
Logic();
usleep(100000);
}
return 0;
} Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!
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getline (cin, name);
cout << "Hello " << name;
return 0;
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C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
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}
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You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
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while (condition) {
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do {
// code
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return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
// code
}