Writing to an output file in C

Question

I am writing a program in C that takes a a command line argument that represents the name of an output file. I then opened the file to write to it. The problem is that when I write something in the command line, it never shows up in the file I was writing to and any text in the file is erased. Here is the code I have for writing to the file from stdin. (fdOut is the FILE * stream that was specified)

 while(fread(buf, 1, 1024, stdin))
 {
   fwrite(buf, 1, 1024, fdOut);
 }

Answer 1

try this code.

#include "stdio.h"

int main()
{
        char buf[1024];
        FILE *fdOut;
        if((fdOut = fopen("out.txt","w")) ==NULL)
        {       printf("fopen error!\n");return -1;}
        while (fgets(buf, 1024, stdin) != NULL)
        {
            //   int i ;
            //   for(i = 0;buf[i]!=NULL; ++i)
            //          fputc(buf[i],fdOut);
                 fputs(buf,fdOut);
            //   printf("write error\n");
        }
        fclose(fdOut);
        return 0;
}

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