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Monday, March 27, 2017

Rounding x++

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static void Job1(Args _args)
{
    int i, ii;
    real r = 334.55, r2 = 334.14;
    ;

    i = decround(r, 0);
    ii = decround(r2, 0);

    // It shows 335, 334
    info(strfmt("%1, %2", i, ii));
}

There is a versatile function in Ax to perform rounding operations: round.
This function rounds the first real argument to the nearest multiple of the second real argument. So plenty of possibilities, for example

round ( 1.2 , 1) equals 1
round ( 1.2 , 5) equals 0
round ( 6.4 , 5) equals 5
round ( 7.5 , 5) equals 10
round ( 1.2 , 0.5) equals 1
round ( 1.12 , 0.1) equals 1.1

If you don't want to work with the multiples of the second argument and instead just want to specify a number of decimals places to round, you can use decround.
This functions rounds the first real argument to the number of decimals specified (second argument). So for example

decround (1.2 , 0) equals 1
decround (1.23 , 0) equals 1
decround (1.23 , 1) equals 1.2
decround (1.25 , 1) equals 1.3

But the second argument can be negative as well. Like this:

decround (123, -2) equals 100


Now for rounding with a little twist: roundup.

If you want to round a number up to the next real value, you can use roundup. This function is the same as the ceiling function from other environments.
Same format as the previous round functions, needing 2 arguments.
So for example

roundup ( 1.23 , 0.1) give as result 1.3
roundup ( 123 , 5) equals 125
roundup ( 123.23 , 5) equals 125
roundup ( 123.23 , 1) equals 124

If that ain't enough, more rounding functions: rounddown and roundzero.
Rounddown rounds your real value always down to the multiple of your second argument.
While roundzero, as the function name says, rounds towards zero.
The difference you can see in the next example:

rounddown (-9 , 5) equals -10
roundzero (-9 , 5) equals -5 Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest

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