I've got an assignment due Monday, and I've gotten the program down to one tiny error, and it's cosmetic at best. However, I'd like to have the assignment done to the letter just in case.

In the block below, the program is supposed to force the output to only two decimal places by converting the double value side3 into a string, and rearranging it using substrings until the output is formatted exactly the way I want it to be.

The problem, however, lies in the fact that when posDec is ".00", I'd like the program to erase it and thus append nothing to preDec, producing an output with no decimals at all. I've tried "if" and "when" statements, but each time I only get the error "Cannot convert &posDec. Conversion Error."

{ int dec, sign; char *buff;
buff = _fcvt(side3, 2, &dec, &sign);

string dump = buff; int dSize = dump.size() - 1;
string preDec = dump.substr(0, dec);
string posDec = "." + dump.substr(dec, dSize);

// if (posDec = ".00") posDec.erase();

string s3fin = preDec + posDec;

cout<<"\nSide 3 = "<<s3fin<<" units."<<endl;
}

I am using Bloodshed Dev C++ 9 Beta. Again, any help would be greatly appreciated, and many thanks in advance.

- M. Jackson