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Jun 20th, 2018
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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #define LEN 50
  4.  
  5. void Big_Number(int n)
  6. {
  7. int i,x=0,j;
  8. int a[LEN]={0};
  9. int tail=LEN-1;
  10. a[tail]=1;
  11.  
  12. for(i=1;i<=n;i++)
  13. {
  14. for(j=tail;j>=0;j--)
  15. a[j]=a[j]*i;
  16.  
  17. for(j=tail;j>=0;j--)
  18. {
  19. if(a[j]>10)
  20. a[j-1]=a[j-1]+(a[j]/10);
  21. a[j]=a[j]%10;
  22. }
  23. }
  24. for(j=0;j<=tail;j++)
  25. {
  26. if(a[j]==0)
  27. x++;
  28. else
  29. break;
  30. }
  31.  
  32. for(i=x;i<=tail;i++)
  33. printf("%d",a[i]);
  34. printf("\n");
  35. }
  36. void main()
  37. {
  38. int i;
  39. for(i=1;i<=40;i++)
  40. {
  41. printf("%d!=%d*%d!",i,i,i-1);
  42. Big_Number(i);
  43. }
  44. }
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