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  1. #include <stdio.h>
  2. int main(void)
  3. {
  4.     int  i, n, sum;
  5.     printf("Input n:");
  6.     scanf("%d", &n);
  7.     sum = 0;                     /* 累加和变量初始化为0 */
  8.     for(i =1;i<=n;i++)
  9.     {
  10.     	sum = sum +i;
  11.     }
  12.     printf("sum = %d\n", sum);
  13.     return 0;
  14. }
Success #stdin #stdout 0s 5320KB
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stdin
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100
stdout
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Input n:sum = 5050
https://ideone.com/y8qmQj
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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