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贴个大牛写的代码,差点注释,有点难懂,还请路过的大牛们有空写两句#include<iostream> using namespace std; const int MAX=100; const int BASE=10000; void Multiply(int a[],int len,int b){ for(int i=len-1,carry=0;i>=0;i--){ carry+=b*a[i]; a[i]=carry%BASE; carry/=BASE; } } void Divide(int a[],int len,int b){ for(int i=0,div=0;i<len;i++){ div=div*BASE+a[i]; a[i]=div/b; div%=b; } } int main(){ int i,j,h[110][MAX]; memset(h[1],0,MAX*sizeof(int)); for(i=2,h[1][MAX-1]=1;i<=102;i++){ memcpy(h[i],h[i-1],MAX*sizeof(int)); Multiply(h[i],MAX,4*i-6); Divide(h[i],MAX,i); } while(scanf("%d",&i) && i!=-1){ i++; for(j=0;j<MAX && h[i][j]==0;j++); for(printf("%d",h[i][j++]);j<MAX;j++) printf("%04d",h[i][j]); printf("\n"); } return 0; } Followed by:
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