#include <stdio.h>
#include <stdlib.h>
#define SIZEOFLINE 50

int main(int argc, char *argv[])
{
/*
    argv[0]: Name of source file
    argv[1]: expects log file path
    argv[2]: expects from where to start read data
    argv[3]: expects from where to end read data

*/
int from = atoi(argv[2]);
int to = atoi(argv[3]);



FILE *ptr_file;
                             /* ptr_file : is a pointer that poinst to              address of file */
if ((ptr_file = fopen(argv[1],"r")) == NULL)

{
    printf("Error! opening file");
                                                /* Program exits if the    file pointer returns NULL. */
}

int forCounter;                             /* forCounter: counting for taking data from related part from 22-29 */
char string[50];                            /* string[50]: this is the size of line that read each iteration*/
char tempString[7];                         /* tempString: data(int) taken fist as a string */
int counter = 0;                            /* counter is used in dataLog array: for assigning values that taken from log file*/
double value;

double dataTakenFromLog[(to-from)];
                                                /* value used in sscanf : for taken data from log file */
int counterForArray = 0;

while(!feof(ptr_file))
{

    fgets(string,SIZEOFLINE,ptr_file);

    if((counter == from) && (from < to))
    {

    for(forCounter=22;forCounter<29;forCounter++)
    {
                                                            /*it is count 22 to 29 beacuse in our log format data that we want to take is start 22 to 29 */
        if(string[forCounter]==',')
        {
            break;
        }

        tempString[forCounter-22]=string[forCounter];            /*value saved as temp to tempString*/
    }

    sscanf(tempString,"%lf",&value);                            /*scanned string for take double value that consist in tempString*/
    printf("%.1lfn",value);

    dataTakenFromLog[counterForArray] = value;

    counterForArray++;
    from++;
    }
    counter++;
}

    printf("datasize is : %dn", counter);
    int s;
    for(s=0;s<(to-from);s++)
    {

    printf("dataTakenFromLog[%d] is %.1lfn",s,dataTakenFromLog[s]);

    }

fclose(ptr_file);

}

#include <stdio.h>
#include <stdlib.h>
#define SIZEOFLINE 50

int main(int argc, char *argv[])
{
/*
    argv[0]: Name of source file
    argv[1]: expects log file path
    argv[2]: expects from where to start read data
    argv[3]: expects from where to end read data

*/
int from = atoi(argv[2]);
int to = atoi(argv[3]);



FILE *ptr_file;
/* ptr_file : is a pointer that poinst to address of file */
if ((ptr_file = fopen(argv[1],"r")) == NULL)

{
    printf("Error! opening file");
    /* Program exits if the file pointer returns NULL. */
}

int forCounter;                             /* forCounter: counting for taking data from related part from 22-29 */
char string[50];                            /* string[50]: this is the size of line that read each iteration*/
char tempString[7];                         /* tempString: data(int) taken fist as a string */
int counter = 0;                            /* counter is used in dataLog array: for assigning values that taken from log file*/
double value;

int sizeOfData = to-from;              **i changed only  this area just declaration differently**
double dataTakenFromLog[sizeOfData];

/* value used in sscanf : for taken data from log file */
int counterForArray = 0;

while(!feof(ptr_file))
{

    fgets(string,SIZEOFLINE,ptr_file);

    if((counter == from) && (from < to))
    {

        for(forCounter=22;forCounter<29;forCounter++)
        {
            /*it is count 22 to 29 beacuse in our log format data that we want to take is start 22 to 29 */
            if(string[forCounter]==',')
            {
                break;
            }

            tempString[forCounter-22]=string[forCounter];            /*value saved as temp to tempString*/
        }

        sscanf(tempString,"%lf",&value);                            /*scanned string for take double value that consist in tempString*/
        printf("%.1lfn",value);

        dataTakenFromLog[counterForArray] = value;

        counterForArray++;
        from++;
    }
    counter++;
}

printf("datasize is : %dn", counter);
int s;
for(s=0;s<sizeOfData;s++)
{

    printf("dataTakenFromLog[%d] is %.1lfn",s,dataTakenFromLog[s]);

}

fclose(ptr_file);

}