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Genetic Algorithm (8 Queen) (partial).cpp
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Genetic Algorithm (8 Queen) (partial).cpp
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#include<bits/stdc++.h>
using namespace std;
struct node
{
int board[8], heuristic;
double probability;
};
int calc_heuristic(int board[])
{
int count =0;
for(int i=0; i<8; i++)
{
for(int j=i+1; j<8; j++)
{
if(board[i]==board[j])
count++;
else if(abs(board[i]-board[j])==abs(i-j))
count++;
}
}
return 28-count;
}
void print_board(int board[])
{
for(int i = 0; i < 8; ++i)
cout << board[i] << " ";
cout << endl << endl;
}
void crossover(int board1[], int board2[])
{
srand(time(NULL));
int in = rand()%8;
for(int i = in+1; i < 8; ++i)
swap(board1[i], board2[i]);
print_board(board1);
print_board(board2);
}
void mutation(int board[])
{
srand(time(NULL));
int mutate=rand()%2;
if(mutate)
{
int n = rand()%8;
int val = rand()%8;
board[n] = val;
}
print_board(board);
}
bool cmp(node a, node b)
{
return a.probability > b.probability;
}
int main()
{
srand(time(NULL));
node arr[4];
for(int i = 0; i < 4; ++i)
for(int j = 0; j < 8; ++j)
arr[i].board[j] = rand() % 8;
cout << "Initial States" << endl;
for(int i = 0; i < 4; ++i)
print_board(arr[i].board);
cout << "Crossover:" << endl;
for(int i = 0; i < 4; i += 2)
crossover(arr[i].board, arr[i+1].board);
cout << "Mutation" << endl;
for(int i = 0; i < 4; ++i)
mutation(arr[i].board);
double total_heuristic = 0;
for(int i = 0; i < 4; ++i)
{
arr[i].heuristic = calc_heuristic(arr[i].board);
total_heuristic += arr[i].heuristic;
}
for(int i = 0; i < 4; ++i)
arr[i].probability = (arr[i].heuristic / total_heuristic) * 100;
sort(arr, arr+4, cmp);
cout << "After Sort" << endl;
for(int i = 0; i < 4; ++i)
{
cout << "Probability: " << arr[i].probability << "% | Heuristic: " << arr[i].heuristic << " | Board: ";
print_board(arr[i].board);
}
return 0;
}