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  1. #include <stdio.h>
  2. int cc(int n,int r){
  3. 	int i,sn=1,sr=1,s;
  4. 	for(i=n-r+1;i<=n;i++){
  5. 		sn=sn*i;
  6. 	}
  7. 	for(i=1;i<=r;i++){
  8. 		sr=sr*i;
  9. 	}
  10. 	s=sn/sr;
  11. 	return s;
  12. }
  13. int main(void) {
  14. 	int i;
  15. 	for(i=2;i<=4;i++){
  16. 	printf("%dC%dは%d\n",i+3,i,cc(i+3,i));
  17. 	}
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0.01s 5324KB
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stdin
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Standard input is empty
stdout
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5C2は10
6C3は20
7C4は35
https://ideone.com/xWnYGs
2Q-2 2-1
language:
C99 (gcc 8.3)
created:
9 days ago
visibility:
public

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