So i am trying making a simple calculator in pascal but i am having trouble adding fractions. Like for example i am trying to add 1.5 and 1 so the result should be 2.5 but the output i get is something like 2.5000000e+00 something like that.
How can i change the code so that it outputs a 2.5?
program fractionsum;
uses crt;
var
a,b:real;
c:real;
begin
clrscr;
a:=1.5;
b:=1;
c:=a+b;
writeln (c);
readkey;
end.
You'll have to try something like writeln(c:5:2), to output c with 2 digits of decimal places.
You'll have to try something like writeln(c:5:2), to output c with 2 digits of decimal places.
That worked, but if i put 1.5 and 1.5 i get 3.00
Is there a way to only display the 3 in that case?
Typically I use FormatFloat. Are you displaying to a set maximum number of digits?
Say you're displaying a maximum of 5 digits, try:
Writeln(FormatFloat('#.###', num));One of the nice things with FormatFloat is that with the various options for you float format, you can add options into your application (like a ',' as a 1000s seperator, or forcing you display to show a number of 0s after the decimal, etc).
Typically I use FormatFloat. Are you displaying to a set maximum number of digits?
Say you're displaying a maximum of 5 digits, try:
Writeln(FormatFloat('#.###', num));One of the nice things with FormatFloat is that with the various options for you float format, you can add options into your application (like a ',' as a 1000s seperator, or forcing you display to show a number of 0s after the decimal, etc).
I am using free pascal and formatfloat gives me an error when compiling, weird.
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