C++ Programming Code Examples
C++ > Computer Graphics Code Examples
Program to Implement First Fit Decreasing for 1-D Objects and M Bins
/* Program to Implement First Fit Decreasing for 1-D Objects and M Bins
This is a C++ Program to implement First Fit Decreasing for one dimensional objects and M bins. In simple terms this is bin packing algorithm for first fit technique. */
#include <iostream>
#include <time.h>
#include <stdlib.h>
using namespace std;
void binPacking(int *a, int size, int n)
{
int binCount = 0;
int binValues[n];
for (int i = 0; i < n; i++)
binValues[i] = size;
for (int i = 0; i < n; i++)
for (int j = 0; j < n; j++)
{
if (binValues[j] - a[i] >= 0)
{
binValues[j] -= a[i];
break;
}
}
for (int i = 0; i < n; i++)
if (binValues[i] != size)
binCount++;
cout << "Number of bins required using first fit decreasing algorithm is:"
<< binCount;
}
int* sort(int *sequence, int n)
{
// Bubble Sort descending order
for (int i = 0; i < n; i++)
for (int j = 0; j < n - 1; j++)
if (sequence[j] < sequence[j + 1])
{
sequence[j] = sequence[j] + sequence[j + 1];
sequence[j + 1] = sequence[j] - sequence[j + 1];
sequence[j] = sequence[j] - sequence[j + 1];
}
return sequence;
}
int main(int argc, char **argv)
{
cout << "BIN - PACKING Algorithm 1D Objects(First Fit Decreasing)";
cout << "Enter the number of items in Set: ";
int n;
cin >> n;
cout << "Enter " << n << " items:";
int a[n];
for (int i = 0; i < n; i++)
cin >> a[i];
cout << "Enter the bin size: ";
int size;
cin >> size;
int *sequence = sort(a, n);
binPacking(sequence, size, n);
}
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