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  1. #include <stdio.h>
  2.  
  3. void input(int*, float*);
  4. float average(int*, float*);
  5. float variance(int*, float*);
  6. void output(int*, float*);
  7. void output_str(char*, float);
  8.  
  9. int main(){
  10. 	float a[1000];
  11. 	float var;
  12. 	int n;
  13. 	int *pn;
  14. 	float *pa;
  15. 	char *str;
  16.  
  17. 	pn = &n;
  18. 	pa = a;
  19. 	str = ("分散");
  20.  
  21. 	input(pn, pa);
  22. 	var = variance(pn, pa);
  23. 	output(pn, pa);
  24. 	output_str(str, var);
  25. 	return 0;
  26. }
  27.  
  28. void input(int*pn, float*pa){
  29. 	int i;
  30. 	printf("Input Number");
  31. 	scanf("%d", pn);
  32. 	for(i=0; i<*pn; i++){
  33. 		printf("Input Data=");
  34. 		scanf("%f", pa+i);
  35. 	}
  36. 	return;
  37. }
  38.  
  39. float average(int*pn, float*pa){
  40. 	int i;
  41. 	float sum = 0;
  42. 	float av;
  43.  
  44. 	for(i=0; i<*pn; i++){
  45. 	sum = sum+*(pa+i);
  46. 	}
  47.  
  48. 	av = sum/(*pn);
  49.  
  50. 	return av;
  51. }
  52.  
  53. float variance(int*pn, float*pa){
  54. 	int i;
  55. 	float av;
  56. 	float var;
  57. 	float sum = 0;
  58.  
  59. 	av = average(pn,pa);
  60.  
  61. 	for(i=0; i<*pn; i++){
  62. 		sum =sum+(*(pa+i)-av)*(*(pa+i)-av);
  63. 		}
  64.  
  65. 	var = sum/(*pn);
  66.  
  67. 	return var;
  68. }
  69.  
  70. void output(int*pn, float*pa){
  71. 	int i;
  72. 	for(i=0; i<*pn; i++){
  73. 		printf("%f\n",*(pa+i));
  74. 	}
  75. 	return;
  76. }
  77.  
  78. void output_str(char*str, float var){
  79.  
  80. 	printf("%s%f", str,var);
  81. 	return;
  82. }
Success #stdin #stdout 0.01s 5516KB
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stdin
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stdout
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Input NumberInput Data=Input Data=Input Data=Input Data=Input Data=1.000000
2.000000
3.000000
4.000000
5.000000
分散2.000000
https://ideone.com/8P8wXJ
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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