I'm going crazy!

[Deleted] 2014.05.02 14:39

double za = 100*67/750, zb = 100*142/250;
Alert(DoubleToString(za,2), "  ", DoubleToString(zb,2));

The program shows me: za = 8.00 and zb = 56.00

instead my calculator displays: za = 8.93 and zb = 56.80

Why? Why? Why? Why? Why?

GreenMoney 2014.05.02 15:15 #1

GarZed9:

. . .

Why? Why? Why? Why? Why?

You are performing math operations on integers, and only after the operations are complete, the integer is cast to a double. See Typecasting.

Just use a double in the calculation.

Try:

double za = 100*67/750.0, zb = 100*142/250.0;
Alert(DoubleToString(za,2), "  ", DoubleToString(zb,2));

(Notice that I used 750.0 instead of 750 and 250.0 instead of 250)

double trouble Errors, bugs, questions Unexpected Calculation Results

Alain Verleyen 2014.05.02 20:24 #2

William Roeder 2014.05.02 22:58 #3

GarZed9:

double za = 100*67/750, zb = 100*142/250;

The program shows me: za = 8.00 and zb = 56.00

[Deleted] 2014.05.03 05:43 #4

Thirteen:

You are performing math operations on integers, and only after the operations are complete, the integer is cast to a double. See Typecasting.

Just use a double in the calculation.

Try:

(Notice that I used 750.0 instead of 750 and 250.0 instead of 250)

Really thanks to all!