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  1. #include <stdio.h>
  2.  
  3. int printdan(int dan, int num){
  4. 	if(num>9) return 0;
  5. 	else{
  6. 		printf("%d x %d = %d\n",dan, num, dan*num);
  7. 		printdan(dan,num+1);
  8. 	}
  9. }
  10.  
  11. int printgugudan(int dan, int maxdan){
  12. 	if (dan>maxdan) return 0;
  13. 	else{
  14. 		printf("== %d단 ==\n",dan);
  15. 		printdan(dan,1);
  16. 		printf("\n");
  17.  
  18. 		printgugudan(dan+1,maxdan);
  19. 	}
  20. }
  21.  
  22. int main(void){
  23. 	int start, last;
  24. 	start=2;
  25. 	last=9;
  26. 	printgugudan(start,last);
  27.  
  28. }
Success #stdin #stdout 0s 5324KB
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stdin
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Standard input is empty
stdout
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== 2단 ==
2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18

== 3단 ==
3 x 1 = 3
3 x 2 = 6
3 x 3 = 9
3 x 4 = 12
3 x 5 = 15
3 x 6 = 18
3 x 7 = 21
3 x 8 = 24
3 x 9 = 27

== 4단 ==
4 x 1 = 4
4 x 2 = 8
4 x 3 = 12
4 x 4 = 16
4 x 5 = 20
4 x 6 = 24
4 x 7 = 28
4 x 8 = 32
4 x 9 = 36

== 5단 ==
5 x 1 = 5
5 x 2 = 10
5 x 3 = 15
5 x 4 = 20
5 x 5 = 25
5 x 6 = 30
5 x 7 = 35
5 x 8 = 40
5 x 9 = 45

== 6단 ==
6 x 1 = 6
6 x 2 = 12
6 x 3 = 18
6 x 4 = 24
6 x 5 = 30
6 x 6 = 36
6 x 7 = 42
6 x 8 = 48
6 x 9 = 54

== 7단 ==
7 x 1 = 7
7 x 2 = 14
7 x 3 = 21
7 x 4 = 28
7 x 5 = 35
7 x 6 = 42
7 x 7 = 49
7 x 8 = 56
7 x 9 = 63

== 8단 ==
8 x 1 = 8
8 x 2 = 16
8 x 3 = 24
8 x 4 = 32
8 x 5 = 40
8 x 6 = 48
8 x 7 = 56
8 x 8 = 64
8 x 9 = 72

== 9단 ==
9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
9 x 4 = 36
9 x 5 = 45
9 x 6 = 54
9 x 7 = 63
9 x 8 = 72
9 x 9 = 81
https://ideone.com/6cGG3z
language:
C (gcc 8.3)
created:
13 hours ago
visibility:
public

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