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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,y ;
  5. 	x = 0 ;
  6. 	for(int y=0 ; y<=n ; y ++) {
  7. 		x += y ;
  8. 	}
  9. 	return x;
  10. }
  11.  
  12. int main(void) {
  13. 	int a,b;
  14.     scanf("%d",&a);
  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 0.01s 5320KB
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1から32766までの和は536821761
https://ideone.com/icNUWR
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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