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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define max 10
  4. int arr[max];
  5.  
  6. void display(int n){
  7. 	for(int i=1;i<=n;i++){
  8. 		for(int j=1;j<=n;j++){
  9. 			if(arr[i]!=j)
  10. 			cout<<"_  ";
  11. 			else
  12. 			cout<<"Q ";
  13. 		}
  14. 		cout<<endl;
  15. 	}
  16. 	cout<<"=++++++++++++++++++++++++++++++++++++++++++++++++"<<endl;
  17. }
  18. bool canplace(int k,int i){
  19. 	for(int j=1;j<k;j++){
  20. 		if(arr[j]==i || abs(arr[j]-i)==abs(j-k))
  21. 		 return false;
  22. 	}
  23. 	return true;
  24. }
  25. void nQueen(int k,int n){
  26. 	for(int j=1;j<=n;j++){
  27. 		if(canplace(k,j)){
  28. 			arr[k]=j;
  29. 			if(k==n)
  30. 			display(n);
  31. 			else{
  32. 				nQueen(k+1,n);
  33. 			}
  34. 		}
  35. 	}
  36. }
  37.  
  38. int main(){
  39. 	int n=4;
  40. 	nQueen(1,n);
  41. 	return 0;
  42. }
Success #stdin #stdout 0s 4392KB
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stdin
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Standard input is empty
stdout
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_  Q _  _  
_  _  _  Q 
Q _  _  _  
_  _  Q _  
=++++++++++++++++++++++++++++++++++++++++++++++++
_  _  Q _  
Q _  _  _  
_  _  _  Q 
_  Q _  _  
=++++++++++++++++++++++++++++++++++++++++++++++++
https://ideone.com/O0S5rV
language:
C++14 (clang 8.0)
created:
4 years ago
visibility:
public

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