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  1. #include <stdio.h>
  2.  
  3. int rec(int n){
  4.     if (n == 1){
  5.         return 1; 
  6.     }
  7.     else{
  8.         return n * n + rec(n - 1); 
  9.     }
  10. }
  11.  
  12. int main(void) {
  13.     int N=4; 
  14.  
  15.  
  16.     for (int n = 1; n <= N; n++) {
  17.         printf("1から%dまでの二乗和の値は%d\n", n, rec(n));
  18.     }
  19.  
  20.     return 0;
  21. }
  22.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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1から1までの二乗和の値は1
1から2までの二乗和の値は5
1から3までの二乗和の値は14
1から4までの二乗和の値は30
https://ideone.com/344fdh
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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