how to store fractional numbers with a fractional part having 25-30
digits after decimal place,
does long double has the same precision as double?.
1 more prob.
format specifier for long double is %lf and same for double, so if i
write
       long double a;
       scanf("%lf",&a);
       a=a*2;
       printf("%lf",a);
why is the output -2.0000  ?

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