I am trying to input a text file with twenty unsorted names in it into an array and then perform a bubblesort and output to a new file. The filename for the txt file is names.txt
Here is what I have so far....not much...I would appreciate some help the right direction. I have read quite a bit on the subject but it is not quite fitting together in my head yet.
#include<stdio.h>
#include<stdlib.h>
int main (void)
{
FILE *fptr;
fptr1=fopen("names.txt", "r");Open the file
Store the contents of the file, one line at a time into an array- Possibly an array of character pointers
Sort the character pointer array
I am trying to input a text file with twenty unsorted names in it into an array and then perform a bubblesort and output to a new file. The filename for the txt file is names.txt
Here is what I have so far....not much...I would appreciate some help the right direction. I have read quite a bit on the subject but it is not quite fitting together in my head yet.#include<stdio.h> #include<stdlib.h> int main (void) { FILE *fptr; fptr1=fopen("names.txt", "r");
The next step - did fopen return a valid FILE pointer...
The next step - did fopen return a valid FILE pointer...
I am still trying to input my text file into an array
Here is the code I have now..is this any closer?...I really need some input...I am very new at this.Thanks!
#include<stdio.h>
#include<stdlib.h>
int main (void)
{
int bytes_read
int nbytes =80
FILE *cfptr;
fptr1=fopen("names.txt", "r");
if (*cfptr=fopen(names.txt, "r"))==NULL) {
printf("File can not be opened.")
} /*end if*/
my_string = (char *) calloc (nbytes + 1);
bytes_read = getline (&names, &nbytes, stdin);Use fread to read from the file . Check out this link
http://irc.essex.ac.uk/www.iota-six.co.uk/c/i2_feof_fgets_fread.asp
while(check till end of file)
{
/*
fread will put the data in array1
After that use string copy to move the data to character pointer array...lets say array2
*/
}Thanks to all for your help thus far. I am learning! I now have the text file I created reading into a char array and need to sort it using bubble sort and read into an output file. I have read some about this...but need some direction and help please. If I have to move my data into an array of pointers to do this I don't understand how to do that. Here is what I have so far.
#include <stdio.h>
int main() {
char c[12]; /* declare a char array */
FILE *file; /* declare a FILE pointer */
file = fopen("names.txt", "r");
/* open a text file for reading */
if(file==NULL) {
printf("Error: can't open file.\n");
/* fclose(file); DON'T PASS A NULL POINTER TO fclose !! */
return 1;
}
else {
printf("File opened successfully. Contents:\n\n");
while(fgets(c, 12, file)!=NULL) {
/* keep looping until NULL pointer... */
printf("String: %s", c);
/* print the file one line at a time */
}
printf("\n\nNow closing file...\n");
fclose(file);
return 0;
}
}http://ee.hawaii.edu/~tep/EE160/Book/chap9/section2.1.4.html
This should help.
Thank you. This information helps my understanding quite a bit. However, I do have to use bubble sort for this particular program. Would someone be willing to help me use that method to sort my array?. I do not quite understand how to do it. Is it necessary for me to create an array of pointers to use that sort method also? I know these questions show my lack of experience but I have to learn somehow.
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