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Full Discussion: Error message: invalid types 'bool...' (array problem)
Top Forums Programming Error message: invalid types 'bool...' (array problem) Post 302562730 by qf_woodfox on Saturday 8th of October 2011 12:10:35 AM
Old 10-08-2011
Data Error message: invalid types 'bool...' (array problem)
Hello everyone.

I'm stuck with an error message that neither I nor any of my computer science peeps can understand. The program I wrote is meant to be a simple decimal to binary converter, but with this message it's more complicated than I thought.

Here's the code:
Code:
#include <iostream>
#include <cmath>
using namespace std;

int main()
{
	int num = 0;
	int k = 0;
	int max = 0;
	bool binary[100];
	cout << "Enter a decimal number: " ; 
		cin >> num;
		
	while (pow(2,k) <= num)
		k++;
		
	k--;				// Decrements the power after the highest power of 2 is found.	  
	max = k;
	
	while (k >= 0 && num > 0)
	{
		if (pow(2,k) > num)
			binary[k] = 0;
		else
		{
			binary[k] = 1;
			num -= pow(2,k);
		}
		k--;
	}
	
	while (max >= 0)
	{
		cout << binary[max];
		max++;
	}
	
return 0;
}

The error exactly says:
...\dectobin.cpp:27: error: invalid types 'bool [100][double]' for array subscript
...\dectobin.cpp:30: error: invalid types 'bool [100][double]' for array subscript

If it helps, I'm using Quincy... but only because my lecturer is using Quincy.

Any help is appreciated greatly.

PS, is there any reason why the variable k can't be of type int?
 

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LEARN ABOUT OSF1

xmreptypeaddreverse

XmRepTypeAddReverse(3X) 												   XmRepTypeAddReverse(3X)

NAME

       XmRepTypeAddReverse - A representation type manager function that installs the reverse converter for a previously registered representation
       type

SYNOPSIS

       #include <Xm/RepType.h>

       void XmRepTypeAddReverse (rep_type_id)
	       XmRepTypeId rep_type_id;

DESCRIPTION

       XmRepTypeAddReverse installs the reverse converter for a previously registered representation type.  The reverse converter takes a  numeri-
       cal  representation  type  value  and returns its corresponding string value.  Certain applications may require this capability to obtain a
       string value to display on a screen or to build a resource file.

       The values argument of the XmRepTypeRegister function can be used to register representation  types  with  nonconsecutive  values  or  with
       duplicate  names for the same value.  If the list of numerical values for a representation type contains duplicate values, the reverse con-
       verter uses the first name in the value_names list that matches the specified numeric value.  For example, if a value_names array has  can-
       cel, proceed, and abort, and the corresponding values array contains 0, 1, and 0, the reverse converter will return cancel instead of abort
       for an input value of 0.  Specifies the identification number of the representation type

SEE ALSO

       XmRepTypeGetId(3X), XmRepTypeRegister(3X)

															   XmRepTypeAddReverse(3X)
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