error C2451: conditional expression of type 'class fstream' is illegal Ambigu

[Rashmi Gosavi]

case 2 : //Display All Records
file.seekg(0,io s::beg);
cout<<"\n\nReco rds in Phone Book\n";
while(file){
file.read((char *) &rec, sizeof(rec));
if(!file.eof())
rec.showdata();
}
file.clear();
getch();
break;

[weaknessforcats]

This compiles for me. Your error may vbe outside this code snippet.