Re: math.h ceil problem

Try ceil(12/5.0). I believe 12/5 is an integer division and is equal to 2. 12/5.0 is dividing by a double and is equal to 2.4.

- Wayne

On 27/06/2013, at 18:45, kuldeep dhaka <[email protected]> wrote:

> //c program
> 
> #include <msp430.h>
> #include <math.h>
> 
> void main(void)
> {
>    unsigned int i = ceil(12/5);
> 
>    P1DIR = i;
> }
> 
> /////output
> 
>    .file    "prog1.c"
>    .arch msp430g2553
>    .cpu 430
>    .mpy none
> 
>    .section    .init9,"ax",@progbits
>    .p2align 1,0
> .global    main
>    .type    main,@function
> /***********************
> * Function `main'
> ***********************/
> main:
>    mov.b    #2, &__P1DIR
> .LIRD0:
> .Lfe1:
>    .size    main,.Lfe1-main
> ;; End of function
> 
> ////makefile
> PREFIX=msp430-
> 
> MCU=msp430g2553
> 
> # c compiler
> CC=$(PREFIX)gcc
> CFLAGS=-O2 -mmcu=$(MCU)
> 
> all:
>    $(CC) $(CFLAGS) -save-temps -o prog1.elf    prog1.c
> 
> 
> 
> i was expecting ceil(12/5) = 3 not 2.
> 
> -- 
> *Kuldeep Singh Dhaka*
> Sakul
> +91-8791676237
> [email protected]
> Programmer, Open Source, Web Developer, System Administrator, Entrepreneur,
> Animal Lover, Student, Reverse Engineer, Embedded System, Learning.
> 
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> Fork Me <https://github.com/kuldeepdhaka>
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