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  1. #include <stdio.h>
  2.  
  3. // inner loop
  4. unsigned mul(unsigned a, unsigned b) {
  5.     unsigned res = 0;
  6.     while (b--) res += a;
  7.     return res;
  8. }
  9.  
  10. // outer loop
  11. unsigned fact(unsigned n) {
  12.     unsigned f = 1;
  13.     while (n) f = mul(f, n--);
  14.     return f;
  15. }
  16.  
  17. int main(void) {
  18. 	int n = 7;
  19.     printf("%d! is %u\n", n, fact(n));
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0s 9424KB
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stdin
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Standard input is empty
stdout
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7! is 5040
https://ideone.com/oWAVJh
fact mul
language:
C (gcc 8.3)
created:
5 years ago
visibility:
secret

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