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  1. #include <stdio.h>//第1講演習 2-0
  2.  
  3. int conb(int n, int r){
  4. 	if(r>1){
  5. 		return conb(n-1,r-1)*n/r;
  6. 	}
  7. 	else if(r==1) return n;
  8. }
  9. int main() {
  10. 	int a,n,r;
  11. 	n=7;
  12. 	r=4;
  13. 	a=conb(n,r);
  14. 	printf("%dC%d=%d",n,r,a);
  15. 	return 0;
  16. }
  17.  
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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7C4=35
https://ideone.com/K3AlPW
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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