题目内容

假设一棵二叉树的后序遍历序列为DGJHEBIFCA，中序遍历序列为DBGEHJACIF，则其前序遍历序列为 ______。

查看答案

搜索结果不匹配？点我反馈

更多问题

The first newspapers were handwritten sheets which were posted in public places. The earliest recorded newspaper was started in Rome in 59 B. C.. In the 700s, the world’s first printed newspaper was developed in China. The paper was printed from carved wooden blocks and distributed among the citizens. Europe didn’t have a regularly published newspaper until 1609, when one was started in Germany. The first regularly published newspaper in the English language was printed in Amsterdam in 1620. In 1621, an English newspaper was started in London and was published weekly. The first daily English newspaper was the Daily Courant( current), which didn’t appear until March 1702. In 1690, Benjamin Harris printed the first American newspaper in Boston. The paper was called Publick (public) Occurrences, hath forreign (foreign) and domastick (domestic). The local government, however, didn’t approve of the paper and stopped its publication after the first issue. In 1704, John Campbell started the Boston Newsletter, the first newspaper to be published daily in the American colonies. By 1760, the colonies had more than thirty daily newspapers. There are now about 1 800 daily papers in America. Today, as a group, English language newspapers have the largest circulation all over the world. The largest circulation for an individual newspaper, however, is that of the Japanese newspaper Asahi Shimbun, which sells more than eleven million copies each day. How long is it since the first newspaper was printed()

A. 700 years,
B. Over 2,000 years.
C. About 1,300 years.
D. About 380 years.

请补充main函数。该函数的功能是：求1～100(不包括100)以内所有素数的平均值。程序运行后的结果为42.40。注意：部分源程序给出如下．请勿改动主函数main和其他函数中的任何内容，仅在 main函数的横线上填入所编写的若干表达式或语句。试题程序： #include＜stdio.h＞ main() int i, j, n=0，flag； float aver=0； clrscr()； for(j=2；j＜100；i++) flag=1； for(i=2；i＜j；i++) if( 【1】 ) flag=0； break； if( 【2】 ) n++； aver+=j； printf("\n\n average=%4.2f"，【3】 )；

请编写函数fun()，其功能是：将s所指字符串中除了下标为偶数、同时ASCII值也为偶数的字符外，其余的全部删除，串中剩余字符所形成的一个新中放在t所指的数组中。例如，若s所指字符串中的内容为ABCDEFG123456，其中字符A的ASCII码值为奇数，因此应当删除；其中字符B的 ASCII码值为偶数，但在数组中的下标为奇数，因此也应当删除；而字符2的ASCII码值为偶数，所在数组中的下标也为偶数，因此不应当删除，其他依此类推。最后t所指的数组中的内容应是246。注意：部分源程序给出如下。请勿改动主函数main和其他函数中的任何内容，仅在函数fun的花括号中填入所编写的若干语句。试题程序： #include＜conio.h＞ #include＜stdio.h＞ #include＜string.h＞ void fun(char*s，char t[]) main() char s[100]，t[100]； clrscr()； printf("\nPlease enter string S：")； scanf("%s"，s)； fun(s,t)； printf("\nThe result is：%s\n"，t)；

在一棵二叉树上第5层的结点数最多是( )。

A) 8
B) 16
C) 32
D) 15