动态生成二维数组...

#include <stdio.h>
#include <string.h>
int main()
{
    int n,m,i,j;
    while (scanf("%d%d",&n,&m)!=EOF)
    {
        int** a=new int* [n];
        for (i=1;i<=n;i++)
            a[i]=new int [m];
        for (i=1;i<=n;i++)
            for (j=1;j<=m;j++)
                 a[i][j]=i*j;
        for (i=1;i<=n;i++)
        {
            for (j=1;j<=m;j++)
                 printf("%4d",a[i][j]);
             printf("\n");
        }
    }
    return 0;