程序代码：

#include<stdio.h>
int main(void)
{
    printf("%*da\n",0,1234);
    printf("%*db\n",5,1234);
    printf("%*dc\n",10,1234);
    printf("%*dd\n",20,1234);
    printf("%-*de\n",0,1234);
    printf("%-*df\n",5,1234);
    printf("%-*dg\n",10,1234);
    printf("%-*dh\n",20,1234);
    return 0;
}