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  1. #include <stdio.h>
  2. int num;
  3. int col(int n) {
  4. 	num++;
  5. 	if (n == 1) {
  6. 		return 1;
  7. 	}
  8. 	else if (n%2 == 0) {
  9. 		return col(n/2);
  10. 	}
  11. 	else {
  12. 		return col(3*n + 1);
  13. 	}
  14. }
  15. int main(void) {
  16. 	int x = 10;
  17. 	printf("実行結果1: %d\n", col(x));
  18. 	printf("実行結果2: %d\n", num);
  19. 	return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5324KB
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stdin
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Standard input is empty
stdout
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実行結果1: 1
実行結果2: 7
https://ideone.com/eKBgVC
language:
C (gcc 8.3)
created:
7 hours ago
visibility:
public

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