I think you are trying to remove dollar signs, commas, carriage returns and line feeds from your file.

#define CR 0x0D
#define LF 0x0A

I always open files in binary mode to avoid any confusing translation of CR and/or LF:

unsigned char c;
FILE *inptr,*outptr;

inptr=fopen("input","rb");
outptr=fopen("output","wb");

while(fread(&c,1,1,inptr)==1)
{
if((c!=',') && (c!='$') && (c!=CR) && (c!=LF))
{
fwrite(&c,1,1,outptr);
}
}
fcloseall();

Hope this helps.