Simple Implementation of Flood Fill Algorithm using C++

flood_fill_algorithm.cpp

#include <iostream>
#include <fstream>

using namespace std;

//Assume picture dimension is 10 letters X 25 letters
void printArray(char c[10][25]){
    for(int a=0;a<10;a++){
        for(int b=0;b<25;b++){
            cout<< c[a][b];
        }
        cout<<"\n";
    }
}

void changeColor(char c[10][25], char oldChar, char newChar, int x, int y){
    if(x<0 || x>24 || y<0 || y>9){
        return;
    }
    if(c[y][x] != oldChar){
        return;
    }
    
    c[y][x] = newChar;
    
    changeColor(c,oldChar,newChar,x,y-1);
    changeColor(c,oldChar,newChar,x+1,y);
    changeColor(c,oldChar,newChar,x,y+1);
    changeColor(c,oldChar,newChar,x-1,y);
}

int main(){
    char array[10][25];

    ifstream input ("//home//tharindu//Documents//CodeLite//flood_fill_algo//input.txt");
    
    if (input.is_open()){
        while( !input.eof() ){
            for(int a=0;a<10;a++){
                for(int b=0;b<25;b++){
                    input.get(array[a][b]);
                }
                input.get();
            }
        }
    }else{
        cout << "Image Not opened!";
        cin.get();
        return 0;
    }
    
    cout << "Starting image\n";
    cout << "------------------------\n\n";
	printArray(array);


    int x,y;
    cout << "X coordinate of the initial pixel: ";
    cin >> x;
    cout << "Y coordinate of the initial pixel: ";
    cin >> y;

    changeColor(array,array[x][y],'-',x,y);

    cout << "After applying flood fill algorithm\n";
    cout << "------------------------\n\n";
    printArray(array);
    return 0;
}