Reading and writing formatted I/O in C.

//------------------------------------------------------
// File: Code602_FileIO.cpp
// Purpose: Demonstration of formatted I/O in ANSI Standard C
// Programming Language: C
// Author: Dr. Rick Coleman
//---------------------------------------------------------------
#include <stdio.h>
#include <string.h>

int main(void)
{
    int inum;
    float fnum;
    char string[81];
    FILE *fptr;
    fptr = fopen("textfile.txt", "w");
    //-----------------------------------------------------------
    //  Writing formatted data to a file
    //  I/O function:  int fprintf(File *fptr, char *format,...)
    //-----------------------------------------------------------
    do
    {
        printf("Type int, float, and string: ");
        scanf("%d %f %s", &inum, &fnum, string);
        fprintf(fptr,"%d %f %s\n",inum,fnum,string);
    }
    while (inum != 0);
    fclose(fptr);

    //-----------------------------------------------------------
    //  Reading formatted data from a file
    //  I/O function:  int fscanf(File *fptr, char *format,...)
    //-----------------------------------------------------------
    if((fptr=fopen("textfile.txt","r"))==NULL)
    {
        printf("Can't open textfile.txt.\n");
        return 0;
    }
    while(fscanf(fptr,"%d %f %s", &inum, &fnum, string) != EOF)
        printf("%d %f %s\n",inum,fnum,string);
    fclose(fptr);
    return 0;
}