以下程序的输出结果是( ) int main() { printf("\n*s1=%15s*","chinabeijing"); printf("*s2=%-5s*","chi"); return 0; }

A、*s1=chinabeijing□□□* *s2=**chi*;
B、*s1=chinabeijing□□□* *s2=chi□□*;
C、*s1=*□□chinabeijing* *s2=□□chi*;
D、*s1=□□□chinabeijing* *s2=chi□□*