Writing user input to a file in C

Question

I am working on a program to write user input to a file and then search for a specific record in the file and output it to the screen. I tried using fgets and also fputs but havent been successful

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
main ()
  {
FILE *fileptr;
char id [30];
char name [47];
char amt[50];
int i;

fileptr=fopen("C:\\Users\\Andrea\\Documents\\Tester.txt","w");
 if (fileptr == NULL) {
     printf("File couldn't be opened\n\a\a");
     fclose(fileptr);
     exit(0);
  }

  printf("Enter name: \n");
  fscanf(fileptr,"%c",name);
  fputs(name,fileptr);
  fclose(fileptr);
  printf("File write was successful\n"); 
  return 0;
  }

Something seems to have gone wrong during posting. Please click edit to post your program (and perhaps describe what's "not working so well"). — Fred Foo
– Fred Foo, Commented Nov 13, 2011 at 22:23

glglgl · Accepted Answer · 2011-11-14 00:15:47Z

0

There are several problems.

You are trying to read from fileptr.
You are reading only one character, but treat the name array as if it was read in correctly.

A start would be:

  [...]
  printf("Enter name: \n");
  if (fgets(name, sizeof name, stdin)) {
    fputs(name,fileptr);
    fclose(fileptr);
    printf("File write was successful\n");
  } else {
    printf("Read error.\n");
  }

But that's not all: you have forgotten to put error checking. E.g., how do you know that your "File write was successful\n" if you don't check at least the return value of fputs()?

answered Nov 14, 2011 at 0:15

glglgl

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2 Comments

user1 Over a year ago

this needs to be done to get 10 records, could a for loop work?

glglgl Over a year ago

1. No, that could not work. Why do you want to read from fileptr which you have opened for "w"riting? I think you wanted to read from stdin? 2. A for loop would indeed work. But befor we are putting together fragments, you might want to define exactly what you try to achieve, so we can help "as a block".

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