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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.     for (int i = 1; i <= n; i++) {
  16.         printf("1から%dまでの二乗和の値は%d\n", i, rec(i));
  17.     }
  18.  
  19.     return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5320KB
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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/CU0dqM
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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