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  1. #include <stdio.h>
  2. int main(void) {
  3. int n = 4;
  4. int b = 3, c = 2;
  5. int tmp;
  6. for (int i = 3; i <= n; i++) {
  7. tmp = 2 * b + c;
  8. c = b;
  9. b = tmp;
  10. }
  11. printf("数列a%dの値は%d\n", n, b);
  12. return 0;
  13. }
Success #stdin #stdout 0.01s 5328KB
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Standard input is empty
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数列a4の値は19
https://ideone.com/7ucVZK
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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