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  1. #include <stdio.h>
  2. //課題B-1: 1からnまでの和を求めるコードを完成させてください
  3. int sum(int n){
  4. 	int x=1,y=0;
  5. 	while(n>=x){
  6. 		y=y+x;
  7. 		x=x+1;
  8. 	}
  9. 	return y;
  10. }
  11.  
  12. int main(void) {
  13. 	int a,b;
  14.     a = 10;
  15.     b = sum(a);
  16.     printf("1から%dまでの和は%d", a,b );
  17. 	return 0;
  18. }
  19.  
Success #stdin #stdout 0s 5316KB
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1から10までの和は55
https://ideone.com/rG9zMC
2026/9/10 1
language:
C (gcc 8.3)
created:
7 hours ago
visibility:
public

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