ruhatadiyaman wrote:
> thanks for all replies. i tried them but still the problem is continuing.
> this is my code with 'unsigned long int';
> /*factorial*/
> #include<stdio.h>
> int main()
> {
> int x, y;
> unsigned long int fak;
>
> for(x=1;x<=20;x++){
> printf("%d!\t", x);
> fak=x;
> if(x>=2){
> for(y=x;y>=2;y--){
> fak=fak*(y-1);
> }
> }
> printf("%lu\n", fak);
> }
> getch();
> return 0;
> }
>
> so after 13 the results are wrong :(
> otherwise i confused with usage of long double. i wrote this simple code
> which is below;
> #include<stdio.h>
> int main()
> {
>
> long double x, y;
> scanf("%Lf", &x);
> scanf("%Lf", &y);
> printf("x=%Lf y=%Lf\n", x, y);
> printf("result=%Lf", x*y);
> getch();
> }
>
> when i run it,for example, i give 2 for x and 4 for y,the program gives this;
> x=2.000000 y=0.000000
> result=-2.000000
>
> what's this?
>
> best regards
You could also use unsigned long long int and %llu (minimum of 64-bits,
which will be more accurate than 'float' or 'double'). The following is
worth keeping around as well for future reference:
http://cubicspot.blogspot.com/2009/03/unsigned-long-long-long-long-long-int.html
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