class text
{
public:
       text(char* s)               //s是一个指针吗,str=new char[strlen(s)+1];中的s是指指向str字符串的指针?
       {
str=new char[strlen(s)+1];         //这里是不是动态分配,象一般是这样char* p=new char[],有什么区别?
strcpy(str,s);
len=strlen(s);
}    
...
void   main()
{
text array("good morning");
...
}

回复 2楼 ly861014

题目:
class text
{
public:
       text(char* s)                    
 {
str=new char[strlen(s)+1];        
strcpy(str,s);
len=strlen(s);
}     
char operator[](int n)
{
if(n>len-1)
{
cout<<"数组下标越界"<<endl;
return*(str+n);
}
void print(){
cout<<str<<endl;
}
private:
int len;
char* str;
};
void   main()
{
text array("good morning");
array.print();
cout<<"location 0:"<<array[0]<<endl;
cout<<"location 20:"<<array[20]<<endl;
}