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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5.     int i, sum;
  6.     sum = 0;
  7.  
  8.     for (i = 0; i < 999; i++)
  9.     {
  10.         sum = sum + i;
  11.     }
  12.  
  13.     printf("1から1000までの合計は %d です。\n", sum);
  14.  
  15.     return 0;
  16. }
Success #stdin #stdout 0.01s 5312KB
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Standard input is empty
stdout
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1から1000までの合計は 498501 です。
https://ideone.com/6u9bNm
language:
C (gcc 8.3)
created:
21 hours ago
visibility:
public

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