fork download
copy 
  1. #include <stdio.h>
  2.  
  3. void
  4. done(int n)
  5. {
  6. 	for(int i=1,j=1,k=1;i<=n*n;i++) {
  7. 		printf("%d",k);
  8. 		if(i==j) {
  9. 			printf("\n");
  10. 			if(i<=n*n/2) j+=++k;
  11. 			else j+=--k;
  12. 		}
  13. 	}
  14. }
  15.  
  16. int
  17. main()
  18. {
  19. 	done(9);
  20. 	return 0;
  21. }
Success #stdin #stdout 0s 2160KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
1
22
333
4444
55555
666666
7777777
88888888
999999999
88888888
7777777
666666
55555
4444
333
22
1
https://ideone.com/Omci4S
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!