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Program of histogram by calculating the partial histograms and consolidating in the end to get the final histogram

Posted By: Easy Tutor     Category: C Programming     Views: 1652

Write a program of histogram by calculating the partial histograms and consolidating in the end to get the final histogram.

Code for Program of histogram by calculating the partial histograms and consolidating in the end to get the final histogram in C Programming

# include <stdio.h>
# include </usr/include/sys/types.h>
# include </usr/include/sys/shm.h>
# include </usr/include/sys/sem.h>
# include </usr/include/sys/ipc.h>
# include <stdlib.h>                 // For rand() Function
# include "forkjoin.h"
# include "sharedlib.h"
# include "spinlock.h"
# define arrSize 50
int main()
{    
    int arr[arrSize];
    int iCount;                  // Counter Variableint NoOfBins=5;                // Number of binsint binsize;                // Size of each binint *histogram;
    int parhist[50];            // Partial Histogram for each Processint *lock;                // For Locking entire Binint shmidlock,shmidhist;
    int id;
    int bin; // Subscript of histogram arrayint minarr,maxarr;
    int i;
    // Initialize an Arrayfor(iCount=0;iCount<arrSize;iCount++)
    {
        arr[iCount]=rand()%arrSize;
    }
    
    minarr=arr[0];
    maxarr=arr[0];
    for(iCount=1;iCount<arrSize;iCount++)
    {
        if(minarr > arr[iCount])
        {
            minarr=arr[iCount];
        }
        if(maxarr < arr[iCount])
        {
            maxarr=arr[iCount];
        }
    }

    binsize=(maxarr-minarr) / NoOfBins;

    
    lock=(int*)sshared(sizeof(int)*NoOfBins,&shmidlock);
    histogram=(int*) sshared(sizeof(int)*NoOfBins,&shmidhist);
    
    printf("\n Bin Size : %d",binsize);
    printf("\n No. Of Bins : %d\n",NoOfBins);
    
    for(iCount=0;iCount<NoOfBins;iCount++)
    {
        histogram[iCount]=0;
        parhist[iCount]=0;
    }
    printf("\n");
    id=process_fork(NoOfBins);
    spin_lock_init(&lock[id]);    
    for(iCount=id;iCount<arrSize;iCount=iCount+NoOfBins)
    {
        bin=abs(arr[iCount] - minarr)/binsize;
        if(bin>=NoOfBins)
        {
            bin=NoOfBins - 1;
        }
        printf("Process( %d ):Number [%d] is %d\t Bin:%d\n",id,iCount,arr[iCount],bin);
        
        parhist[bin]++;    
    
    }
    
    for(iCount=0;iCount<NoOfBins;iCount++)
    {
        spin_lock(&lock[id]);
            histogram[iCount] = histogram[iCount] + parhist[iCount];
        spin_unlock(&lock[id]);
    }
    
    printf("\n");    
    process_join(NoOfBins,id);
    
    for(iCount=0;iCount<NoOfBins;iCount++)
    {
        printf("No Of Items in Bin(%d) is %d\n",iCount,histogram[iCount]);
    }
    cleanup_memory(&shmidlock);;
    cleanup_memory(&shmidhist);    
    return 0;
}
  
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Easy Tutor
Easy Tutor author of Program of histogram by calculating the partial histograms and consolidating in the end to get the final histogram is from United States. Easy Tutor says

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