C++ :: How Many Streams With A File

I wanted to know if i could use two streams with a file

fstream fS;
ifstream read;
fs.open("text.txt", ios::in | ios::out | ios::app);
read.open("text.txt", ios:: in);

my aim is to read a record from text.txt in to fs and compare it with other records of text.txt by read

bool checkID(char userID, inStream read);
read.open("text.txt", ios::in);
while (read.good()){
read.getline(id, size);
if(strcmp (id, userID)==0)
return true;
}
return false;