Thread: How to read the data in a file and print it and then copy the contents to a file?

Code:

#include <stdio.h>
#include <stdlib.h>

int main (int argc, char *argv[])
{  
    char buffer[256];
    FILE * myfile;
    myfile = fopen("read.txt","r");
    while (feof(myfile)==0)
    {
       
        fgets(buffer,256,myfile);
        printf("%s",buffer);
       
        printf("%d", feof(myfile));
       
    }
    
    fclose(myfile);
}

Help please? I also got an error in printing wherein the data in read.txt is "Hello" newline "World" and my program prints world twice. D: help!

Don't use feof() - it doesn't work the way you expect it works.

Code:

#include <stdio.h>
#include <stdlib.h>

int main (int argc, char *argv[])
{  
    char buffer[256];
    FILE * myfile;
    myfile = fopen("read.txt","r");
    while ((fgets(buffer,256,myfile))!= NULL) {
        printf("%s",buffer);
             
    }
    
    fclose(myfile);
}

printing the last line twice is unfortunately, the way that feof() works - and why it shouldn't be used, in general. Use the above.

I see. thanks a lot!

Use fputs() to write the data to the file.