有以下程序#include #include main(){ char a[5][10]={ "china","beijing","you","tiananmen","welcome"};int i,j; char t[10];for(i=0;i<4;i++) for(j=i+1;j<5;j++) if(strcmp(a[i],a[j])>0){strcpy(t,a[i]); strcpy(a[i],a[j]); strcpy(a[j],t);} puts(a[3]);}程序运行后的输出结果是_______。
A.beijing
B.china
C.welcome
D.tiananmen