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  1. #include <math.h>
  2. #include <stdio.h>
  3.  
  4. void print(double x);
  5.  
  6. int main(void) {
  7. 	printf("%f\n", -1234.5678);
  8. 	print(-1234.5678);
  9. 	printf("%f\n", 10000000000000.0);
  10. 	print(10000000000000.0);
  11. 	printf("%f\n", 99999999999999.0);
  12. 	print(99999999999999.0);
  13. 	printf("%f\n", 0.0000001);
  14. 	print(0.0000001);
  15. 	printf("%f\n", 0.000001);
  16. 	print(0.000001);
  17. 	printf("%f\n", 0.99999999999999);
  18. 	print(0.99999999999999);
  19. 	return 0;
  20. }
  21.  
  22. void print(double x) {
  23. 	double y, z;
  24. 	int d, ds[64];
  25. 	int i;
  26.  
  27. 	if (x < 0.0) {
  28. 		putchar('-');
  29. 	}
  30.  
  31. 	y = fabs(x);
  32. 	z = y;
  33. 	for (i = 0;; ++i) {
  34. 		ds[i] = (int)fmod(z, 10.0);
  35. 		z /= 10.0;
  36. 		if (z < 1.0) {
  37. 			break;
  38. 		}
  39. 	}
  40. 	for (; i >= 0; --i) {
  41. 		putchar('0' + ds[i]);
  42. 	}
  43.  
  44. 	putchar('.');
  45.  
  46. 	z = y;
  47. 	for (;;) {
  48. 		z *= 10.0;
  49. 		d = (int)fmod(z, 10.0);
  50. 		z = fmod(z, 1.0);
  51. 		putchar('0' + d);
  52. 		if (z < 0.00000000000001) {
  53. 			break;
  54. 		}
  55. 	}
  56.  
  57. 	putchar('\n');
  58. }
  59.  
Success #stdin #stdout 0s 2296KB
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stdin
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Standard input is empty
stdout
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-1234.567800
-1234.567800000000033833202905952930450439453125
10000000000000.000000
10000000000000.0
99999999999999.000000
99999999999999.0
0.000000
0.0000001
0.000001
0.000001
1.000000
0.9999999999999900079927783735911361873149871826171875
https://ideone.com/J7zUBa
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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