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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. 	double a,r,T,S,oldS;
  6.  
  7. 	a = 1,r = 0.9;
  8. 	T = a;
  9. 	S = a;
  10.  
  11. 	do{
  12. 		oldS = S;
  13. 		T = T * r;
  14. 		S = oldS + T;
  15. 	}while((S - oldS) < 0.00001);
  16.  
  17. 	printf("初項%f 項比%fの等比数列の和＝%f",a,r,S);
  18.  
  19. 	return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5324KB
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Standard input is empty
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初項1.000000 項比0.900000の等比数列の和＝1.900000
https://ideone.com/90FQho
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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