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Gentoo Taiwan 討論區 • 檢視主題 - 玩弄數字 真正安全的軟體需要精確的亂數產??
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玩弄數字 真正安全的軟體需要精確的亂數產??

文章發表於 : 週二 10月 14, 2003 5:42 am
【Palatis】

無聊的小程式

文章發表於 : 週二 2月 17, 2004 3:17 pm
jlovet
你好,我寫了一個無聊的小程式
但是我沒有測試過
(要po上來才想到,等等寫看看會不會平均,這樣算ok嗎)

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main()
{
unsigned int i;
char * str="123";
char r[1000]; //這邊隨便你改.愛產生幾位數就幾位數
i=(int)str;
srandom(time(0));
int j=random();
for (int k=0;k<100;k++)
{
j*=random();
j%=1000;
r[k]=*(char *)(i+j); //從記憶體裡面亂讀東西出來,可惜只能讀自己process區塊的,讀到別人的好像會segmental fault
}
for (int k=0;k<1000;k++)
printf("%d",abs(r[k]));
}