[問題] C++ 亂數產生
開發平台(Platform): (Ex: VC++, GCC, Linux, ...)
Dev-C++
額外使用到的函數庫(Library Used): (Ex: OpenGL, ...)
No
問題(Question)：
設定一半徑為500的圓,隨機產生一點於圓內並算出與圓點的距離
現在有個問題就是,我的x1產生出來的值,沒有辦法像y1這麼的隨機
餵入的資料(Input)：
No
預期的正確結果(Expected Output)：
x1:-500~500的值,y1:-500~500的值
錯誤結果(Wrong Output)：
x1感覺有固定的順序,Ex:-433,-427,-420
程式碼(Code)：(請善用置底文網頁, 記得排版)
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<time.h>
main()
{
int x1,y1;
float r1;
srand(time(NULL));
x1=(rand()%1000)-500;
y1=(rand()%1000)-500;
r1=sqrt(x1*x1+y1*y1);
if(r1<=500)
{
printf("x1 = %d\n",x1);
printf("y1 = %d\n",y1);
printf("r1 = %lf\n",r1);
}
else
{
printf("x1 = %d\n",x1);
printf("y1 = %d\n",y1);
printf("r1 is error\nr1 is %lf\n",r1);
}
}
補充說明(Supplement)：
No
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