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  1. #define _CRT_SECURE_NO_WARNINGS
  2. #include <float.h>
  3. #include <math.h>
  4. #include <stdio.h>
  5.  
  6. #define max(a,b) (((a)>(b))?(a):(b))
  7.  
  8. void dispf(float f)
  9. {
  10. 	char		str[32];
  11. 	char*		pc;
  12. 	unsigned char*	pf;
  13. 	int		i, b;
  14.  
  15. 	pf = (unsigned char*)&f;
  16. 	pc = str;
  17. 	for (i = 0; i < 4; i++) {
  18. 		for (b = 0; b < 8; b++) {
  19. 			*pc++ = '0'+((pf[3-i]>>(7-b))&1);
  20. 		}
  21. 	}
  22. 	printf("%.1s %.8s %.23s\n", str, str + 1, str + 9);
  23. 	printf("%.8E\n", f);
  24. 	printf("%f\n", f);
  25. }
  26.  
  27. int main()
  28. {
  29. 	float	a, b;
  30.  
  31. 	printf("a = 1970.199707\n");
  32. 	a = (float)1970.199707;
  33. 	dispf(a);
  34. 	printf("b = 1970.2\n");
  35. 	b = (float)1970.2;
  36. 	dispf(b);
  37. 	return 0;
  38. }
  39.  
Success #stdin #stdout 0.01s 1676KB
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stdin
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Standard input is empty
stdout
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a = 1970.199707
0 10001001 11101100100011001100100
1.97019971E+03
1970.199707
b = 1970.2
0 10001001 11101100100011001100110
1.97019995E+03
1970.199951
https://ideone.com/TU8G2
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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