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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(int n){
  4. 	int a,b=1,c=0,d=0;
  5. 	for(int i=3;i<=n;i++){
  6. 		a=b+c+d;
  7. 		d=c;
  8. 		c=b;
  9. 		b=a;
  10. 	}return a;
  11. }
  12.  
  13.  
  14.  
  15. int main(void) {
  16. 	int n = 7;
  17.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0.01s 5320KB
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Standard input is empty
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数列Tnについて, n=7のときの値は13
https://ideone.com/HchwCE
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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