关于构造函数初始化问题
class teacher
{
char classname[5][100]; //教的班级名 最多都五个班
char bixiuke[5][100]; //教的必修课名
char xianxiuke[5][100]; //教的选修课名 最多教五门课
public:
teacher();
};
teacher::teacher()
{
classname[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
bixiuke[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
xianxiuke[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
}
很奇怪，编译时提示：
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(47) : error C2059: syntax error : '{ '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(47) : error C2143: syntax error : missing '; ' before '{ '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(47) : error C2143: syntax error : missing '; ' before '} '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(49) : error C2059: syntax error : '{ '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(49) : error C2143: syntax error : missing '; ' before '{ '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(49) : error C2143: syntax error : missing '; ' before '} '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(51) : error C2059: syntax error : '{ '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(51) : error C2143: syntax error : missing '; ' before '{ '
D:\Program Files\Microsoft Visual Studio\MyProjects\ex1\ex1.cpp(51) : error C2143: syntax error : missing '; ' before '} '
请问这是怎么回事啊？我单独把这个类注释掉：
在main函数里：
void mail()
{
char classname[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
}
编译时是没有问题的，请问为什么在类内就不行呢？
[解决办法]
使用strcpy进行赋值
strcpy(classname[0], "norecord ");
strcpy(classname[1], "norecord ");
strcpy(classname[2], "norecord ");
strcpy(classname[3], "norecord ");
strcpy(classname[4], "norecord ");
[解决办法]
char classname[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
编译时是没有问题的，请问为什么在类内就不行呢？
---------------
char classname[5][100];
classname[5][100] ={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
你看看问题是不是来了。
BTW：写成classname={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};是普通错误，写成classname[5][100] ={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};是高级错误
[解决办法]
数组一旦定义了就最好初始化,不初始化话只能用修改数组的内容,数组的地址和容量不能修改.
teacher::teacher()
{
//这里classname[5][100]是一个数组的元素,但他实际不存在.非法
classname[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
bixiuke[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
xianxiuke[5][100]={ "norecord ", "norecord ", "norecord ", "norecord ", "norecord "};
}
[解决办法]
C、C++就这么规定的：不可以。不需要理由。
