when a string constant is written in C program，the compiler creates (75) of characters containing the characters of the string，and terminating it with"＼0"．(75)

A．a group

B．an array

C．a set

D．a series

[单选题]When a string constant is written in C program， the compiler creates ( ) of

[试题]在C＃中，string str = null 与 string str = “” 请尽量使用文字或图象说明其中的区别。

[主观题]C．#中，string str = null 与 string str =””，请尽量用文字说明区别。(要点：说明详细的内存空间分配)

[试题]在C＃中，string str = null 与 string str = " " 请尽量使用文字或图象说明其中的区别。

[主观题]C．#中，string str = null 与 string str =""，请尽量用文字说明区别。(要点：说明详细的内存空间分配)

[主观题]关于C£«£« string类的小问题#include <iostream>#include <string>using namespace std;void main(){ string a="我很好";}如果我cout<<a;那么会输入 我很好 但我只想输出我或者好该怎么做呢?相比char字符串可以直接用[]下标运算付找到并输出很好方便,但a是string是一个对象不能用下标运算符像char一样一定要用string而不是 char

[单选题]A． floating constant consists of an integer part，a decimal point，a fraction part，an e or E，and an optionally signed integer _______．A．exponentB．orderC．superfluousD．SuperiorA．B．C．D．

[单选题]C．ompared to a constant pitch propeller, a controllable pitch propellerA．more efficiently uses available engine powerB．operates at a lower efficiency at a fixed speedC．produces the same torque at lower engine powerD．develops its rated power at a lowe

[单选题]The pump has a constant stroke and the amount of fuel delivered is regulated by rotating （） which has a specially arranged helical groove cut into it.A . the pump cylinderB . the pump camC . the pump plungerD . the pump miler

[试题]已知String类定义如下：class String{public:String(const char *str = NULL); // 通用构造函数String(const String &another); // 拷贝构造函数~ String(); // 析构函数String & perater =(const String &rhs); // 赋值函数private:char *m_data; // 用于保存字符串};尝试写出类的成员函数实现。