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大整数乘法c语言数组,很大的数相乘怎么办?

發(fā)布時間:2024/9/27 编程问答 32 豆豆
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#include&nbsp??

#include&nbsp??

using&nbsp??namespace&nbsp??std;

int&nbsp??main(int&nbsp??argc,&nbsp??char&nbsp??*argv[])

{

&nbsp?&nbsp

&nbsp?&nbsp?long&nbsp??i,j,?c,len,temp?=?0;

&nbsp?&nbsp?int&nbsp??n&nbsp??=&nbsp??95123;

&nbsp?&nbsp?long&nbsp?*a=new&nbsp??long[4&nbsp??*&nbsp??n];&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp??//動態(tài)分配空間

&nbsp?&nbsp?a[0]=1;&nbsp??len=1;

&nbsp?&nbsp?for(i=0;&nbsp??i<12;&nbsp??i++)

&nbsp?&nbsp?{

&nbsp?&nbsp?&nbsp?&nbsp?c=0;

&nbsp?&nbsp?&nbsp?&nbsp?for(j=?0;&nbsp?j

&nbsp?&nbsp?&nbsp?&nbsp?{

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?temp=a[j]*?n+c;

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?c=?temp/10000;

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?a[j]=temp%10000;

&nbsp?&nbsp?&nbsp?&nbsp?}

&nbsp?&nbsp?&nbsp?&nbsp

&nbsp?&nbsp?&nbsp?&nbsp?while(c>0)&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp??//處理進位

&nbsp?&nbsp?&nbsp?&nbsp?{

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?len?=?len?+1;

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?a[len-1]=c;

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?c/=?100000;

&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?a[len?-?1]%=10000;

&nbsp?&nbsp?&nbsp?&nbsp?}

&nbsp?&nbsp?}

&nbsp?&nbsp?printf(?"%ld?",&nbsp??a[len-1]);

&nbsp?&nbsp?for(i=len-2;&nbsp??i>=0;?i--)&nbsp?&nbsp?&nbsp??//逆序輸出

&nbsp?&nbsp?&nbsp?&nbsp?printf(?"%04ld?",&nbsp??a[i]);&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp

&nbsp?&nbsp

&nbsp?&nbsp?delete&nbsp??a;&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp?&nbsp??//釋放空間

&nbsp?&nbsp

&nbsp?&nbsp?system(?"PAUSE?");

&nbsp?&nbsp?return&nbsp??0;

}

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