Question

Apologies in advance, because I suspect this may be a silly question.

I have written a function for reading in data from an external file. I then use the data to perform calculations using other code I have written.

The function works by finding a data label that looks like this:

 const std::string findMe = "<dataLabel>";  

Each time I want to find data, I replace dataLabel with the label of whichever data I need from the file.

Here’s what I want to do.
I don’t want to have to write in the label of the data I want each time. I want to be able to do this:

for (int i = 0; i < anyNumberOfDataSets; i++)  
{
    findMe = "<dataLabeli>"; 
    // Then run function for reading in data, put data into a vector.
}

I could then add any number of data sets to my external file, give each one the title
, and have each data set read into a vector.

The problem is, I simply can’t figure out how to write findMe = "<dataLabeli>". Is this even possible?

I have tried things like, findMe = "<dataLabel" << i <<, but no luck!

Any suggestions would be much appreciated.

Answer 1

you’ve already got the right answer, so this is just trying to help you with solving such problems in the future:

Your core problem here is to convert the integer i into a string s (if you’ve done this, than you just do findMe = "<datalabel"; findMe += s; findMe += ">";.

Googling for c++ convert integer into string will give you this as the first result. Problem solved.

This is not saying “use google before/instead of asking”, it’s rather “try to identify the core problem”.