From: suresh kanna [mailto:[EMAIL PROTECTED]
>hai,
>
>Can anyone help me(explain) in this program!
>
>main(){
>float f= 0.7;
>if(f<0.7)
> {printf("The value less than 0.7");}
>else
> printf("The value greater ");
>}
>
>
>But the output appears as(the value less than 0.7)
>
>why soo?The system reconizess the value as 0.69999..i think
>so(not sure)
>
>Can anyone help me in this one...and explain y so!
Because 0.7 cannot be exactly represented in a binary format, so the
nearest approximation is stored (in this case it happens to be slightly
less than 0.7)
An example which you may more readily recognise is the fraction 1/3.
THis cannot be exactly represented as a decimal: 0.3333333....
Any (decimal) representation of this number (e.g. 0.333) will always be
less than 1/3.
Similarly with 2/3 = 0.666666.... - any representation will always be
greater (e.g. 0.66667)
Some fractions can be exactly represented in both bases, e.g. 1/8
(0b0.001 or 0.125)
--
PJH
"Real programmers can write assembly code in any language." - Larry Wall
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