以下程序的输出结果是( )
main()
{ printf("\n*s1=%15s*","chinabeijing");
printf("\n*s2=%-5s*","chi");}
A. *s1=chinabeijing * B.*s1=chinabeijing *
*s2=**chi* *s2=chi *
C. *s1=* chinabeijing * D.*s1= chinabeijing*
*s2=* *chi* *s2=chi *
并解释一下谢谢