有以下程序，其中函数 f 的功能是将多个字符串按字典顺序排序：#includevoid f(char*p[],intn){ char*t;inti,j; for(i=0;i0){ t=p[i];p[i]=p[j];p[j]=t;}}main(){char *p[5]={"abc","aabdfg","abbd","dcdbe","cd"};f(p,5);printf("%d\n",strlen(p[1]));}程序运行后的输出结果是______。A．2