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Re:请高手帮俺看看,我已经提交了六次了,还是错!!谢谢!In Reply To:请高手帮俺看看,我已经提交了六次了,还是错!!谢谢! Posted by:caison at 2006-04-11 17:14:58 > #include<iostream>
> #include<string>
> #define N 500
> using namespace std;
> int c[N]={0};
> int Length(int a[]);
> void Mul(int a[],int b[]);
> int main()
> {
> string R,s="99.999",t="0.0";
> int n , m , i ,j , point;
> cin>>R>>n;
> if(R>=s||R<=t||n<=0||n>25)return 0;
> for(i=R.length()-1;i>=0;i--)
> {
> if(R.at(i)!='0')
> {
> i++;
> R=R.substr(0,i);
> break;
> }
> }
> int length=R.length();
> int a[N]={0},b[N]={0};
> for(i=0,j=length-2;i<length;i++,j--)//把R去小数点存入 a;
> {
> if (R.at(i)=='.')
> {
> point=i+1;
> j++;
> }
> else a[j]=b[j]=R.at(i)-48;
> }
> point=length-point;
> m=n-1;
> while(m)
> {
> Mul(a,b);
> for(i=Length(c)-1;i>=0;i--)
> {
> b[i]=c[i];
> c[i]=0;
> }
> m--;
> }
> if(Length(b)<point*n)
> {
> cout<<'.';
> for(i=point*n;i>Length(b);i--)
> cout<<0;
> }
> for(i=Length(b)-1;i>=0;i--)
> {
> if(i==(point*n-1))
> {
> cout<<".";
> point=0;
> i++;
> }
> else
> cout<<b[i];
> }
> cout<<endl;
> return 0;
> }
> void Mul (int a[],int b[])
> {
>
> int i , j , k , x , y , z;
> int length_a=Length(a);
> int length_b=Length(b);
> for( i=0;i<length_a;i++)
> {
> for(j=0;j<length_b;j++)
> {
> x=a[i]*b[j];
> y=x/10;
> z=x%10;
> k=i+j;
> c[k]+=z;
> c[k+1]=c[k+1]+y+c[k]/10;
> c[k]=c[k]%10;
> }
> }
> k=length_a+length_b-1;
> if(c[k]==0)k--;
> }
> int Length(int a[])
> {
> int i=N-1;
> while(!a[i]&&i>=0)
> i--;
> return i+1;
> }
>
> 是不是要把全部的数据在程序一次执行就处理完才行啊??
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