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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. 	int a,i,sum;
  6. 	scanf("%d",&a);
  7.  
  8. 	for(i=1;i<=a;i++){
  9. 		sum=sum+i;
  10. 		}
  11. 		printf("1から%dまでの和は%dです",a,sum);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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4
stdout
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1から4まで足した合計は10です
https://ideone.com/AJvJu1
language:
C (gcc 8.3)
created:
10 hours ago
visibility:
public

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