I am writing a C program that reads integersfrom a text file whose name is given

Question

I am writing a C program that reads integersfrom a text file whose name is given as a command-line argument.The program will display the largest, smallest, and median integerfromthe file.

I have some partial code written to open the file and read thefile, plus I already have the sorting function ready to peice intothe program. I do need help sorting out the "file name given as acommand line argument"

Also can I just call my sort fuction like normal in main(), callingthe function and sending the name of the char array and thesize?

Code written so far:

#include <stdio.h>
#include <stdlib.h>
#define MAX 1000
#define FILE_NAME "numbers.txt"

int main(int argc, char *argv[])
{
      char numbers[MAX];
      FILE* pFile;

      if(argc != 2)
      {
            printf("usage:%s large_small_median", argv[0]);
      }
      else
      {
            pFile= fopen(argv[1], "r");

            if(pFile== 0)
            {
                  printf("Erroropening file ");
            }
            else
            {
                  intx;

                  while((x = fgetc(pFile)) != EOF)
                  {
                        printf("%c",x);
                  }
            }

            while(fgets (numbers, MAX, pFile) != NULL )
            {
                  printf("%s", numbers);
            }

            fclose(pFile);
      }
      printf(" ");
      getchar();
      return 0;
}

void quicksort(int a[], int low, int high)
{
      int middle;
      if(low >= high)
            return;
      middle = split(a, low,high);
      quicksort(a, low,middle-1);
      quicksort(a, middle+1,high);
}

int split(int a[], int low, int high)
{
      int part_element = a[low];
      for(; ;)
      {
            while(low< high && part_element <= a[high])
                  high--;
            if(low>= high)
                  break;
            a[low++]= a[high];
            while(low< high && a[low] <= part_element)
                  low++;
            if(low>= high)
                  break;
            a[high--]= a[low];
      }
      a[high] = part_element;
      return high; } I am writing a C program that reads integersfrom a text file whose name is given as a command-line argument.The program will display the largest, smallest, and median integerfromthe file.

I have some partial code written to open the file and read thefile, plus I already have the sorting function ready to peice intothe program. I do need help sorting out the "file name given as acommand line argument"

Also can I just call my sort fuction like normal in main(), callingthe function and sending the name of the char array and thesize?

Code written so far:

#include <stdio.h>
#include <stdlib.h>
#define MAX 1000
#define FILE_NAME "numbers.txt"

int main(int argc, char *argv[])
{
      char numbers[MAX];
      FILE* pFile;

      if(argc != 2)
      {
            printf("usage:%s large_small_median", argv[0]);
      }
      else
      {
            pFile= fopen(argv[1], "r");

            if(pFile== 0)
            {
                  printf("Erroropening file ");
            }
            else
            {
                  intx;

                  while((x = fgetc(pFile)) != EOF)
                  {
                        printf("%c",x);
                  }
            }

            while(fgets (numbers, MAX, pFile) != NULL )
            {
                  printf("%s", numbers);
            }

            fclose(pFile);
      }
      printf(" ");
      getchar();
      return 0;
}

void quicksort(int a[], int low, int high)
{
      int middle;
      if(low >= high)
            return;
      middle = split(a, low,high);
      quicksort(a, low,middle-1);
      quicksort(a, middle+1,high);
}

int split(int a[], int low, int high)
{
      int part_element = a[low];
      for(; ;)
      {
            while(low< high && part_element <= a[high])
                  high--;
            if(low>= high)
                  break;
            a[low++]= a[high];
            while(low< high && a[low] <= part_element)
                  low++;
            if(low>= high)
                  break;
            a[high--]= a[low];
      }
      a[high] = part_element;
      return high; }

Explanation / Answer

please rate - thanks sample run C:UsersDefault.XPS420Desktopcramster>untitled1"numbers.txt" The unsorted numbers 5 6 3 8 2 The sorted numbers 2 3 5 6 8 C:UsersDefault.XPS420Desktopcramster> code with corrections #include #include #define MAX 1000 //#define FILE_NAME "numbers.txt" void quicksort(int a[], int low, int high); int split(int a[], int low, int high); int main(int argc, char *argv[]) {     int a[MAX];       //char numbers[MAX];       FILE* pFile;       int low=0, high=0,i;       if(argc != 2)       {            printf("usage: %s large_small_median", argv[0]);       }       else       {            pFile = fopen(argv[1], "r");            if(pFile == 0)            {                  printf("Error opening file ");            }            else            {                                   printf("The unsorted numbers ");                  while( (fscanf(pFile,"%d",&a[high])) >0)                  {                           printf("%d ",a[high]);                        high++;                  }            }            low=0;                        quicksort(a,low,high);            /*while (fgets (numbers, MAX, pFile) != NULL )            {                  printf ("%s", numbers);            }*/                      printf("The sorted numbers ");            for(i=0;i= high)            return;       middle = split(a, low, high);       quicksort(a, low, middle-1);       quicksort(a, middle+1, high); } int split(int a[], int low, int high) {       int part_element = a[low];       for(; ;)       {            while(low

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.