Programming Forums - Calculating error

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irish

Sep 11th, 2006 9:12 AM

Calculating error

I've been learning pascal recently and i cant seem to do simple calculations correctly.

Example:

program        calculate;



var

        cost:        real;

        people:        integer;



begin

        Writeln('How many people?');

        Readln(people):

        Writeln('How much per person?');

        Readln(cost);

        Writeln('Total cost: ', people*cost);

        Readln;

end.

Returns a value of 1.800000000Ex01

Any ideas?

Thanks in advance.

Eoin	Sep 11th, 2006 9:45 AM

Depending on the input of course there is probably nothing wrong with that output, which has a value of 18 I believe.

I guess where you're having difficulty is in the representation of reals when printed, in this case in exponential or scientific format. Unfortunatly I don't know pascal to suggest a way of changing the output but I'm sure someone here will :) .

irish

Sep 19th, 2006 5:14 AM

Yea found the problem.

Needed to show how many digits:decimal places i wanted to display:

Writeln('Total cost: ', people*cost:6:2);

Thanks anyway Eoin :)

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