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  1. #include <stdio.h>
  2.  
  3.  
  4. int rec(int n){
  5.     if (n == 1){
  6.         return 1;              
  7.     }else{
  8.         return rec(n - 1) + n*n; 
  9.     }
  10. }
  11.  
  12. int main(void) {
  13.     // n=1〜4 の結果を順に表示
  14.     for (int n = 1; n <= 4; n++){
  15.         printf("1から%dまでの二乗和の値は%d\n", n, rec(n));
  16.     }
  17.     return 0;
  18. }
  19.  
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/CPRgvu
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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