Hi Gents,
This is what I am trying to do.
Say you have a double or a float with the value 14.5624 for example.
How could I take that variable and get the 14 into an integer variable
and the .5624 into a double or float?
The reason is because of converting decimal locations into DMS. Math
is simple....
14.5624 = 14 degrees .5624 minutes. Take the .5624 * 60 = 33.744 - 33
minutes .744 seconds. Then do it all over again so .744*60 = 44.64 -
45 seconds.
Basically, I do not know how to get the whole number out into an
integer variable and taking just the decimal place numbers into a
double or float.
Any help is appreciated. 5 8261
"da Vinci" <bl***@blank.co m> wrote in message
news:cf******** *************** *********@4ax.c om... Hi Gents,
This is what I am trying to do.
Say you have a double or a float with the value 14.5624 for example. How could I take that variable and get the 14 into an integer variable and the .5624 into a double or float? The reason is because of converting decimal locations into DMS. Math is simple....
14.5624 = 14 degrees .5624 minutes. Take the .5624 * 60 = 33.744 - 33 minutes .744 seconds. Then do it all over again so .744*60 = 44.64 - 45 seconds.
Basically, I do not know how to get the whole number out into an integer variable and taking just the decimal place numbers into a double or float.
Any help is appreciated.
#include <cmath>
#include <iomanip>
#include <iostream>
int main()
{
double value(14.5624);
double intpart(0);
double fracpart(modf(v alue, &intpart));
std::cout << std::right
<< std::setw(20) << "Value: "
<< value << '\n'
<< std::setw(20) << "Integer portion: "
<< intpart << '\n'
<< std::setw(20) << "Fractional portion: "
<< fracpart << '\n';
return 0;
}
-Mike
On Sat, 24 Jul 2004 03:41:19 GMT, da Vinci <bl***@blank.co m> wrote: Hi Gents,
This is what I am trying to do.
Say you have a double or a float with the value 14.5624 for example. How could I take that variable and get the 14 into an integer variable and the .5624 into a double or float?
The reason is because of converting decimal locations into DMS. Math is simple....
14.5624 = 14 degrees .5624 minutes. Take the .5624 * 60 = 33.744 - 33 minutes .744 seconds. Then do it all over again so .744*60 = 44.64 - 45 seconds.
Basically, I do not know how to get the whole number out into an integer variable and taking just the decimal place numbers into a double or float.
Any help is appreciated.
Well you are going about it the wrong way
14.5624 * 3600 = 52424.64 second ~ 52425 seconds
Now you have an integer
52425 / 3600 = 14 degrees, remainder 2025 seconds
2025 / 60 = 33 minutes, remainder 45 seconds
Use % to get the remainder of a division.
john
da Vinci wrote: Hi Gents,
This is what I am trying to do.
Say you have a double or a float with the value 14.5624 for example. How could I take that variable and get the 14 into an integer variable and the .5624 into a double or float?
Hi,
Integer can be received by using a cast to an integer.
The decimals are available by subtraction.
#include <iostream>
#include <cmath> // required for fabs()
using namespace std;
int main () {
double my_number=-14.5624;
int my_int = static_cast <int>(my_number ); //with sign
// or: int my_int = (int)my_number;
double my_decimals = fabs(my_number-my_int); //signless
cout << "Number:" << my_number <<
"; Integer:" <<my_int<<
"; Decimals:" << my_decimals << endl;
return 0;
}
Number:-14.5624; Integer:-14; Decimals:0.5624
Regards marbac
marbac wrote: da Vinci wrote:
Hi Gents,
This is what I am trying to do.
Say you have a double or a float with the value 14.5624 for example. How could I take that variable and get the 14 into an integer variable and the .5624 into a double or float?
Hi, Integer can be received by using a cast to an integer. The decimals are available by subtraction.
Works this way, but as i saw, there is a more efficient method (modf()
in cmath). http://www.cplusplus.com/ref/cmath/modf.html
regards marbac
On Sat, 24 Jul 2004 03:41:19 GMT, da Vinci <bl***@blank.co m> wrote: Hi Gents,
This is what I am trying to do.
Say you have a double or a float with the value 14.5624 for example. How could I take that variable and get the 14 into an integer variable and the .5624 into a double or float?
The reason is because of converting decimal locations into DMS. Math is simple....
14.5624 = 14 degrees .5624 minutes. Take the .5624 * 60 = 33.744 - 33 minutes .744 seconds. Then do it all over again so .744*60 = 44.64 - 45 seconds.
Basically, I do not know how to get the whole number out into an integer variable and taking just the decimal place numbers into a double or float.
Any help is appreciated.
Gents,
Thanks for the responses. Had a problem after I posted that and hadn't
been able to get on newsgroups.
I actually used the method of declaring an integer variable that was
equal to a defined double....
double dnum=25.625;
int inum = dnum
Since C++ rounds down, in every case I have tested, the integer has
always come out correctly. Then I just do a "dnum = dnum - inum" and
that gives me the integer I need and the double I need.
Appreciate the help gents. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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