程序代码：

#include <stdio.h>
void main()
{
    char a[6][6] = {"50", "2", "203", "9", "1", "24"};
    int i,k,m,n;
    for(i = 0; i < 6; i++)printf("%s ", a[i]);
    printf("\n");
    do
    {
        k=-1;
        for(i=0;i<6;i++)
        {
            if(a[i][0])
            {
                if(k<0)
                    k=i;
                else
                    for(m=0,n=0;a[i][m]||a[k][n];m++,n++)
                    {
                        if(!a[i][m])m--;
                        if(!a[k][n])n--;
                        if(a[i][m]<a[k][n])break;
                        if(a[i][m]>a[k][n])
                        {
                            k=i;
                            break;
                        }
                    }
            }
        }
        if(k>=0)
        {
            printf("%s",a[k]);
            a[k][0]=0;
        }
    }while(k>=0);
    printf("\n");
}