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  1. #include <stdio.h>
  2. //練習問題G
  3.  
  4. int func(int n){
  5.     int a, b=2, c=1;
  6.     int i;
  7. for(i=0;i<n;i++)
  8. {
  9. a=-2*b+2*c;
  10. c=b;
  11. b=a;}
  12. return a;
  13.  
  14. }
  15. int main(void) {
  16. 	int n = 3;
  17.     printf("数列anについて, n=%dのときの値は%d\n", n, func(n));
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5324KB
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Standard input is empty
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数列anについて, n=3のときの値は-20
https://ideone.com/O4OFlr
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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