Re: [avr-gcc-list] Help please: unsigned long + = unsigned char * unsigned char

[dimax un]

On 8/22/06, address@hidden <address@hidden> wrote:
> Dear,
>
> Help, please! The value of c is not what we expect. It should be 50001, but 
> 4294951761!
>
> Condition: mcu=atmega16 WinAVR20060421
>
>
>
> #include
>
> int main(void){
>
> volatile unsigned char a,b;
>
> volatile unsigned long c;
>
> a=250;
>
> b=200;
>
> c=1;
>
> c+=a*b;

Try  c+=(unsigned long)a*(unsigned long)b

> return 0;
>
> }
>
>
>
> B.R.
>
> Niu Yong ________________________________

> 超大U盘免费等你拿
>
>
> *用搜狗拼音写邮件，体验更流畅的中文输入>>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> AVR-GCC-list mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/avr-gcc-list