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May 29th, 2004

conversion type

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Hello guys,
is there a way to declare global variables as float and then convert them to int to be used in a function? i.e.

(Toggle Plain Text)

float num1, num2, result;
float Mod(){
      num1%num2=result; //Wrong, (%) requires int type)
}

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MaxC

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May 29th, 2004

Re: conversion type

Im using the function in a switch statement and the other functions return float numbers.

MaxC

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May 29th, 2004

Re: conversion type

I guess I could use local variables for that function, could I not?
sorry about that.

MaxC

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May 29th, 2004

Re: conversion type

Also, keep in mind that variables can be typecasted. For example:

C++ Syntax (Toggle Plain Text)
int x = 5;
float sum = (float)(x) + 2.25;
int x = 5;
float sum = (float)(x) + 2.25;

I think I did that right, anyways.

cscgal

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The Queen of DaniWeb

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May 29th, 2004

Re: conversion type

Quote originally posted by MaxC ...

Hello guys,
is there a way to declare global variables as float and then convert them to int to be used in a function? i.e.
(Toggle Plain Text)
float num1, num2, result;
float Mod(){
num1%num2=result; //Wrong, (%) requires int type)
}
float num1, num2, result; float Mod(){ num1%num2=result; //Wrong, (%) requires int type) }

The fmod function returns the remainder of floating point division.

Dave Sinkula

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long time no c

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May 29th, 2004

Re: conversion type

something like this should work:

myfloat <- float
myint <- int

myint = 0;
while(myfloat >= 1){
myint++;
myfloat--;
}

Something like that would do the trick... I might have my reasoning a little of but I'm sure that it would work.

Natso

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May 30th, 2004

Re: conversion type

Quote originally posted by MaxC ...

Hello guys,
is there a way to declare global variables as float and then convert them to int to be used in a function? i.e.

yea,sure thing use type casting.

Eg:

float x = 9.879;
int y = (int)x; //y will be 9

you can do it the other way around too.
x=(float)y;

Usually float and int can be assigned to each other as C++ normally does that type casting automatically

FireNet

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Jun 7th, 2004

Re: conversion type

Hello
you can use a most c++ powerful operator
int a;
float numq = 60.7;
a = static_cast<int> (num1);

i don't now why poeple here don't use a c++ feature the are using a c-style

abu_sager

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Jun 7th, 2004

Re: conversion type

Quote originally posted by abu_sager ...

...
i don't now why poeple here don't use a c++ feature the are using a c-style

I think people don't often realize there's more than one kind of cast in C++. If that's news to anyone, go look up casting in a good C++ reference and find out what they are and how they work.

Here's a quick article on why to use C++ casting:
http://www.sjbrown.co.uk/static_cast.html

For this problem, though, a C-style cast isn't very dangerous since we're only dealing with numeric types--the really bad stuff happens when you're casting pointers to classes.

--sg

gusano79

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Jun 9th, 2004

Re: conversion type

two approaches that i can think of:

(1)
float num1, num2, result;
float Mod()
{
float result;
result = (float) ( (int) num1 % (int) num2 );
return result;
}

(2)
use fmod()
check the use of it on mdsn.microsoft.com

ivosetyadi

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