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  1.  
  2. #include<stdio.h>
  3. long fact(int n)
  4. {
  5.     long f;
  6.     if(n==1||n==0)  f=1;
  7.     else f=n*fact(n-1);
  8.     return f;
  9. }
  10. int main()
  11. {
  12.     long y;
  13.     int n;
  14.     scanf("%d",&n);
  15.     y=fact(n);
  16.     printf("%d!=%ld\n",n,y);
  17. }
Success #stdin #stdout 0s 5320KB
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stdin
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20
stdout
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20!=2432902008176640000
https://ideone.com/RLZZZj
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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