Question

Do it on (c) pls.....

1. Assume you have an input file with 6 integer values. Scan these values into an appropriate array.

2. Create a user defined function that takes your array as an input and

order your array from lowest to highest. Ex. If you have an array called num, then num[0] should

contain the smallest value while num[5] will contain the largest value.

3. Output the values between 50-75 into an output file called “results.txt”

4. Any other numbers save to “error.txt”

Answer 1

// i have written this code in c

// i have used fscanf and fprintf for file operations

// i have used bubble sort for sorting elements

// i have done all operations as you required and thereafter

// written an extra function which displays the content of all three files after all operations are done

#include<stdio.h>

#include <stdlib.h>

// this function swaps two elements

// this function is used by bubble sort

// this does inplace swapping i.e. it uses call by reference

void swapping(int *a, int *b)

{

int flag = *a;

*a = *b;

*b = flag;

}

// this function displays the content of all three files after all operations are done

// this displays the content of original file in which there exist six integers "program.txt"

// this also displays content of "results.txt" which contains integers of range "50-75"

// this also displays content of "error.txt" which contains values other than 50-75 range values

void displayFiles()

{

FILE *fptr;

fptr = fopen("program.txt", "r");

int num;

// original file content "program.txt"

printf("\n The contents of original file \n");

while(fscanf(fptr, "%d", &num)!=EOF){

printf("%d ", num );

}

printf("\n");

fclose(fptr);

// content of results.txt file

// contains integer in range 50-75

fptr = fopen("results.txt", "r");

printf("\n The contents of result file \n");

while(fscanf(fptr, "%d", &num)!=EOF){

printf("%d ", num );

}

printf("\n");

fclose(fptr);

fptr = fopen("error.txt", "r");

// contains integer in range other than 50-75 range

// error.txt file

printf("\n The contents of error file \n");

while(fscanf(fptr, "%d", &num)!=EOF){

printf("%d ", num );

}

printf("\n");

fclose(fptr);

}

void main()

{

// file pointers of FILE data type

// used for reading and writing from files

FILE *fptr1,*fptr2;

if ((fptr1 = fopen("program.txt", "r")) == NULL)

{

printf("Error! opening file");

exit(1);

}

// array of six integers

int arr[6];

int x;

// fscanf returns number of values it read

// we will use that returned number to verify that we read six integers

x=fscanf(fptr1,"%d %d %d %d %d %d",&arr[0],&arr[1],&arr[2],&arr[3],&arr[4],&arr[5]);

fclose(fptr1);

// if we didnot get six integers then close operation

if(!(x==6))

{

printf("Error! reading file");

exit(1);

}

// from here

// there is sorting code

// i have used bubble sort for sorting integers in ascending order

int i, j, n=6;

for (i = 0; i < n-1; i++)

for (j = 0; j < n-i-1; j++)

if (arr[j] > arr[j+1])

// in place swapping used here

swapping(&arr[j], &arr[j+1]);

// till here

// after we have read six integers from "program.txt" file and sorted them

// its time to put them in results and error file

fptr1 = fopen("results.txt", "w");

fptr2 = fopen("error.txt", "w");

if (fptr1 == NULL || fptr2 == NULL) {

printf("File open error\n");

exit(1);

}

// iterate array element by element

// if element is between 50-75 put it in results file

// else put that elements in error file

for(x=0;x<6;x++)

{

if(arr[x]>=50 && arr[x]<=75)

{

fprintf(fptr1, "%d\n", arr[x]);

}

else

{

fprintf(fptr2, "%d\n", arr[x]);

}

}

// close file pointers

fclose(fptr1);

fclose(fptr2);

// display file results

displayFiles();

}

OUTPUT n CODE n FILES screenshot: