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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	double x,y;
  5. 	int i,j;
  6. 	for(i=20,x=0.0;i<41;i++){
  7. 		for(y=1.0,j=1;j<=i;j++){
  8. 			y*=(double)((40-j+1)/(double)j);
  9. 		}
  10. 		for(j=0;j<40;j++)y*=0.5;
  11. 		x+=y;
  12. 	}
  13. 	printf("%lf\n",x);
  14. 	x*=x;x*=0.2;
  15. 	printf("%lf",x);
  16. }
  17.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
Standard input is empty
stdout 
0.562685
0.063323
https://ideone.com/sJkaqJ
language:
C (gcc 8.3)
created:
13 days ago
visibility:
public

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