All digits of float to QString

[timmu]

Hi,

I need to convert float to QString so that all original digits (including 0's) are preserved. In the example below 100.0 becomes 100 and I don't want that. How would I do the conversion so that all digits are preserved?

The example shows where my floating number comes from and where it needs to go. I know it seems like running in a circle but my script requires this.

char TestChar[]="100.0";
QString MyChar = TestChar;
float TestFloat = MyChar.toFloat();
 
QString float_to_text; 
float_to_text.setNum(TestFloat);

char TestChar[]="100.0";
QString MyChar = TestChar;
float TestFloat = MyChar.toFloat();

QString float_to_text; 
float_to_text.setNum(TestFloat);

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Alternatively I'd like to know what is the best way to tell if an entry from a file is int or float? Does Qt offer such function? I'd like it to recognize "100.0" as a float.

Thanks!