将for循环迭代器添加到变量

Question

I have an extremely basic question (python user trying to fix some old c++ code that was given to me).

I'm trying to add one to the value of a loop iterator. I need to pass (iterator+1) to a function, but it doesn't work if I pass i+1 as an argument, so I've tried printing some things out.

Ideally, I would like a solution that works when i is of type size_t (this is how it was originally coded).

 for (int i=0; i<npar; i++) {
    int i_plusplus = 1+i;
    cout << i_plusplus << endl;
    MNPOUT(i_plusplus,name,valg,errorg,minvg,maxvg,isVariableg);
    params(i) = val;
 }

I expect it to print 1, 2, 3... etc It actually prints 1i, 2i, 3i...

If I just print out i, I get the value of the iterator (0, 1, 2...)

Answer 1

int i_plusplus += 1 if you want to increment the value of i_plusplus by 1