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  1. #include <stdio.h>
  2. /* 函数功能：用迭代法计算n! */
  3. long fact(int n)
  4. {            /* 定义 */
  5.     int  i;
  6.     long result = 1;
  7.     for (i = 2; i <= n; i++) 
  8.     {
  9.         result = result * i;
  10.     }
  11.     return result;
  12. }
  13. int main(void) 
  14. {
  15.     int  m;
  16.     long ret;
  17.     printf("Input m:");
  18.     scanf("%d", &m);
  19.     ret=fact(m);
  20.     printf("%d! = %ld\n", m, ret);
  21.     return 0;
  22. }
Success #stdin #stdout 0s 5348KB
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stdin
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4
stdout
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Input m:4! = 24
https://ideone.com/RLIm52
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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