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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct student_list {
  5. 	int id;
  6. 	int height;
  7. 	int weight;
  8. }Body;
  9.  
  10.  
  11. int main(void) {
  12. 	double ave;
  13. 	double std;
  14. 	Body data[]={
  15. 	{1,165,60},{2,170,68},{3,160,50},{4,180,75},{5,175,80}
  16. 	};
  17. 	Body a;	
  18. 	for(int i=0;i<4;i++){
  19. 		for(int j=i+1;j<5;j++){
  20. 			if(data[i].height>data[j].height){
  21. 				a=data[i];
  22. 				data[i]=data[j];
  23. 				data[j]=a;
  24. 			}
  25. 		}
  26.  
  27. 	}
  28. 	for(int i=0;i<5;i++){
  29. 		printf("id:%d,height:%d,weight:%d\n",data[i].id,data[i].height,data[i].weight);
  30. 	}
  31.  
  32. 	for(int i=2;i<5;i++){
  33. 		ave+=data[i].height;
  34. 	}
  35. 	ave=ave/3;
  36. 	double b;
  37. 	for(int i=2;i<5;i++){
  38. 	b+=(data[i].height-ave)*(data[i].height-ave);
  39. 	}
  40. 	b=b/3;
  41.  
  42. 	std=sqrt(b);
  43. 	printf("平均：%.1f,標準偏差：%.1f",ave,std);
  44. 	return 0;
  45. }
  46.  
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
Standard input is empty
stdout 
id:3,height:160,weight:50
id:1,height:165,weight:60
id:2,height:170,weight:68
id:5,height:175,weight:80
id:4,height:180,weight:75
平均：175.0,標準偏差：4.1
https://ideone.com/xvtSWL
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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