Amibroker如何在小數點後第3個進行四捨五入 Amibroker

gogogo

例如: 1.2345 -> 1.235

function cRound( value, decplaces )
{
    exponential = exp( log( 10 ) * decplaces );
    rounded = int( value * exponential + 0.5 ) / exponential;
    return rounded;
}

function cPrec( value, decplaces )
{
    return Prec( value + 5*10^-(decplaces+1), decplaces );
}

printf( "round1: %g", cRound( 1.2345, 3 ) );
printf( "\nround2: %g", cPrec( 1.2345, 3 ) );




function cPrec( value, decplaces )
{
    return Prec( value + 5*10^-(decplaces+1), decplaces );
}