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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 rec(n-1)+n*n;
  9.       }
  10. }
  11. int main(void){
  12.     int i;
  13.     for(i=1; i<=4; i++){
  14.     	printf("1から%dまでの二乗和の値は%d\n", i, rec(i));
  15.     }
  16. 	return 0;
  17. }
  18.  
  19.  
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/ClpGKw
language:
C (gcc 8.3)
created:
18 hours ago
visibility:
public

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