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  1. #include <iostream>
  2. using namespace std;
  3. #include <cstdlib>
  4. int fact(int);
  5. int main() {
  6. 	int a;
  7. 	do
  8. 	{
  9. 		cout<<"input am integer:";
  10. 		cin>>a;
  11. 	}while(a<=0);
  12.  
  13. 	cout<<"1*2*...*"<<a<<"="<<fact(a)<<endl;
  14. 	system("pause");
  15. 	return 0;
  16. }
  17. int fact (int a)
  18. {
  19. 	if(a>0)
  20. 	return(a*fact(a-1));
  21. 	else
  22. 	return 1;
  23. }
Success #stdin #stdout #stderr 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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input am integer:1*2*...*21880=0
stderr
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sh: 1: pause: not found
https://ideone.com/0HwJO0
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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