Checking for incoming data type from file

Question

I'm reading in from a .txt file that looks something along the lines of:

int string string string
int string string
int string string string string string

where the number of string types after each int is unknown. Each line represents a new group of values and each group needs to be into their own array value or whatever (don't know if I've worded that correctly but I hope you'll understand what I mean).

Is there a check I can perform so see if the incoming data from the file is an int so that if this is true and can tell my program its a new group of data?

I've tried

int check
if(check = file1.peek()){//start new group assignment} 

but this doesn't appear to work. I need to be able to use the int value once I have found that it is the next data type being read in.

Thanks in advance.

Answer 1

There are several ways to do this, however I would suggest that maybe your groups are on separate lines, and the spaces within a line delimit items within a group correct?

So I would read the file, line-at-a-time and then split each line on spaces.

Let me know if the above fits and then we can explain how to do it.

Ok so you can use getline:

while (cin.good()) // reading from standard input until EOF
{
    String line_str;
    getline(cin, line_str); // get next line from standard input
    istringstream line(line_str); // put line into string stream

    if (line.good()) // read from string stream until EOF
    {
        int x;
        line >> x; // read an integer from string stream

        while (line.good()) // read from string stream until EOF
        {
            string s;
            line >> s; // read strings from string stream
            /// process s
        }
    }
}