fork(1) download
copy 
  1. #include <stdio.h>
  2. //a{n+1} = -2a{n} + 4, a{0}=2(再帰あり版)
  3. int rec(int n){
  4. 	int an=2;
  5. 	for(int i=0;i<n;i++){
  6. 		an=-2*an+4;
  7. 	}
  8. 	return an;
  9. }
  10. int main(void) {
  11.     int n,m;
  12.     scanf("%d",&n);
  13.     scanf("%d",&m);
  14.     printf("数列a%dの値は%d\n", n, rec(n));
  15.     printf("数列a%dの値は%d\n", m, rec(m));
  16.    	return 0;
  17. }
  18.  
  19.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
3
5
stdout
copy 
数列a3の値は-4
数列a5の値は-20
https://ideone.com/GXLZpN
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!