问题 单项选择题

以下叙述中错误的是______。

A.C语言程序中的#include和#define行均不是C语句

B.除逗号运算符外,赋值运算符的优先级最低

C.C语言程序中,j++;是赋值语句

D.C语言程序中,+、-、*、/、%号是算术运算符,可用于整型和实型数的运算

答案

参考答案:D

解析: 在C程序中,以#开头的行都称为“编译预处理”行,它不是C语言本身的组成成分,不能对它们进行直接编译;在运算符优先级表中,逗号运算符的优先级最低,赋值运算符其次;自加运算表达式j++等价于赋值语句j=j+1;求余运算符%仅用于整型变量。故选项D错误。

单项选择题
单项选择题

Who won the World Cup 1994 football game What happened at the United Nations How did the critics like the new play (1) an event takes place, newspapers are on the streets (2) the details. Wherever anything happens in the world, reporters are on the spot to (3) the news.

Newspapers have one basic (4) , to get the news as quickly as possible from its source, from those who make it to those who want to (5) it.

Radio, telegraph, television, and (6) inventions brought competition for newspaper. So did the development of magazines and other means of communication. (7) , this competition merely spurred the newspapers on. They quickly made use of the newer and faster means of communication to improve the (8) and thus the efficiency of their own operations. Today more newspapers are (9) and read than ever before. Competition also led newspapers to branch out into many other fields. Besides keeping readers (10) of the latest news, today’s newspapers (11) and influence readers about politics and other important and serious matters. Newspapers influence readers’ economic choices (12) advertising. Most newspapers depend on advertising for very (13) .

Newspapers are sold at a price that (14) even a small fraction of the cost of production. The main (15) of income for most newspapers is commercial advertising. The (16) in selling advertising depends on a newspaper’s value to advertisers. This (17) in terms of circulation. How many people read the newspaper

Circulation depends (18) on the work of the circulation department and on the services or entertainment (19) in a newspaper’s pages. But for the most part, circulation depends on a newspaper’s value to readers as a source of information (20) the community, city, county, state, nation, and world—and even outer space.

20()

A.by

B.with

C.at

D.about