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答案比较大,double不够In Reply To:用组合数学数公式Pk(n+k)怎么会错呢!!不懂?? Posted by:ecjtubaowp at 2007-01-25 14:55:26 > #include<stdio.h> > double a[1001][1001]; > int main() > { > int i,j,n,m,k,b; > double sum; > for(i=1;i<=1000;i++) > { > for(j=1;j<=100;j++) > { > if((i==j)||(j==1)){a[i][j]=1;continue;} > if(i>j) > { > for(b=1;b<=j;b++) > a[i][j]+=a[i-j][b]; > } > if(i<j)a[i][j]=0; > > } > } > scanf("%d%d",&n,&k); > sum=0; > for(i=1;i<=k;i++) > sum+=a[n][i]; > printf("%.0lf\n",sum); > //while(1); > } Followed by:
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