i got my program to do stuff, but i wondered if i can take it to the next level...

when a user enters a number of 1458.125478 i got it to do abs.... google is soo good!! but now im wondering if you could display just + or - depending on what is entered. I tried creating an int for the sign to go into but it just doesnt want to know!

then i thought about a string so i went down that route not knowing that you cant combine a string and a float together!

so i had another idea

[php]

int main(){
float n; //n is the number entered

cout << " please input your number with the sign";
cin >> n; // prints everything

cout << n<<endl;

return 0;

}

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is it possible to put the float which is entered into an array? that way i can chose what is printed out on the screen?

... unless anyone else has other ideas which i welcome

If it's less than zero, print '-'; otherwise, print '+'.

Of course.

float value[3];
int i;
for ( i = 0; i < 3; ++i )
{
cout << "Please input your number with the sign: ";
cin >> value[i]; // put user-entered value into an array element
if ( value[i] < 0 )

could you explain that bit a little more so i can try and follow whats going on. From my interpration

you got a float thats an array - true?
you print out the array using the loop i

but one thing i dont get is how do you stop it printing the rest out ? just the sign

>could you explain that bit a little more so i can try and follow whats going on. I can't imagine you're having trouble with that. Is this comment confusing?

>you print out the array using the loop i

No. I print a plus or minus. I do so depending on whether the value entered is less than zero.

ok im going back to my book! I should of known how to do that and i cant belive it was that easy...

Intresting topic we have here, I'm wondering if theres a away to just print out the values after the decimal point.

This is what I thought -

If you entered it into a string you'd have some for loop that finds the decimal point and then from their print everything out google has been unsucessful at finding any information regarding this matter

crude but effective idea would be to change the string to an int. Why well with my little depth of c++ itsall i can think of ... But think about it for a moment you convert it to an int ... What can an int hold?? 4 bytes of real numbers... Whole real numbers! so in feect you'd loose your decimal point. All you have to do then is to take away the number left in the string with the one you created - Hence leaving you with the decimal parts.. .Note that you won't get the 0. xxxxxx Not sure how that works ...

Nor could i code this without research , have a go if your still struggling the forum is always here

>I'm wondering if theres a away to just print out the values after the decimal point.
There's a library function in <cmath> called modf that breaks up a floating-point value into its constituent pieces. Alternatively, you could copy the value to an int (which truncates the fractional part) and subtract that from the original floating-point value. Either way, the result is the fractional part of the floating-point value, and you still have access to the whole part.

I have a feeling that in the iostream classes there is a formatting option to set the precision and decimal places. I have never used them myself so i couldnt tell you what they were but a google search should reveal it.

I think it was something along the lines of


If you cant find it try searching for a hexadecimal number tutorial as hex is a formatting flag which tells cout to display numbers in hexadecimal.... as far as i remember...

Thanks for the replies, just wondering if you can split up a string of numbers? ... say all the numbers before the decimal point...into string1
and all the others after the decimal point into string 2?