float vs. double?

Hi there,

I was wondering if someone can explain this? There seems to be a big
difference in the computation which the resultant is float vs. double. I'm
not sure if I understand it myself.

Is this a compiler problem? or just a precision loss?

Robert

---- simple C/C++ cold
#include <stdio.h>
#include <stdlib.h>

void main(void)
{
long int value = 1028827861;
float lsb = 0.0009765625;

float answer;
double danswer;

answer = value * lsb; // debugger - 1004714.7 float
danswer = value * lsb; // debugger - 1004714.7080078125 double


printf("\nFloat value Answer = %6.3f",answer);
printf("\nDouble value Answer = %6.3f",danswer);

/* output
Float value Answer = 1004714.688
Double value Answer = 1004714.708
*/

}



.

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