fork download
copy 
  1. #include<stdio.h>
  2. void fractional_knapsack(float weight[],float profit[],int n,int capacity)
  3. {    
  4.     int i;
  5. 	int used[100];
  6. 	for(i=0;i<n;i++)
  7. 	{
  8. 		used[i]=0;
  9. 	}
  10. 	float total_profit =0.0;
  11. 	int remaining_capacity = capacity;
  12. 	float X[n];
  13. 	while(remaining_capacity>0)
  14. 	{
  15. 		int best_index=-1;
  16. 		float best_ratio=0.0;
  17. 		for(i=0;i<n;i++)
  18. 		{
  19. 			if(used[i]==0)
  20. 			{
  21. 				float ratio =profit[i]/weight[i];
  22. 				if(ratio>best_ratio)
  23. 				{
  24. 					best_ratio=ratio;
  25. 					best_index=i;
  26. 				}
  27. 			}
  28. 		}
  29. 		if (best_index==-1)
  30. 		{
  31. 			break;
  32. 		}
  33. 		used[best_index]=1;
  34. 		if(weight[best_index]<=remaining_capacity)
  35. 		{
  36. 			X[best_index]=1;
  37. 		    total_profit+=profit[best_index];
  38. 			remaining_capacity-=weight[best_index];
  39. 		}
  40. 		else
  41. 		{
  42. 			X[best_index]=(remaining_capacity/weight[best_index]);
  43. 			total_profit+=profit[best_index]*(remaining_capacity/weight[best_index]);
  44. 			remaining_capacity=0;
  45. 		}
  46. 	}
  47. 	printf("X[]:");
  48. 	for(i=0;i<n;i++)
  49. 	{
  50. 		printf(" %.2f ",X[i]);
  51. 	}
  52. 	printf("\ntotal profit is :%.2f",total_profit);
  53. }
  54. int main()
  55. {
  56. 	int n;
  57. 	int i;
  58. 	float weight[n];
  59. 	float profit[n];
  60. 	int capacity;
  61. 	printf("enter items :");
  62. 	scanf("%d",&n);
  63. 	printf("enter capacity :");
  64. 	scanf("%f",&capacity);
  65. 	printf("enter weights");
  66. 	for(i=0;i<n;i++)
  67. 	{
  68. 		scanf("%f",&weight[i]);
  69. 	}
  70. 	printf("enter profits :");
  71. 	for(i=0;i<n;i++)
  72. 	{
  73. 		scanf("%f",&profit[i]);
  74. 	}
  75. 	fractional_knapsack(weight,profit,n,capacity);
  76. 	return 0;
  77. }
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin
copy 
45
stdout
copy 
enter items :enter capacity :enter weightsenter profits :X[]: -0.00  0.00  -0.00  0.00  -0.00  0.00  -0.00  0.00  0.00  0.00  -0.00  0.00  -0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  -0.00  0.00  0.00  0.00  -nan  -nan  -0.00  0.00  -0.00  0.00  -0.00  0.00  -0.00  0.00  0.00 
total profit is :0.00
https://ideone.com/6Fu4eg
language:
C++14 (gcc 8.3)
created:
17 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!