Define MyString class with demands as follows:

0. You CAN NOT use string in the program.

1. MyString can save any string



2. Overload operator + to append string to another one, such as:

MyString S1, S2, S3

S1 = S2 + S3



3. Define Find function to locate the position of searching substring, such as:

MyString S("Hello,world!")

int x = S.Find("world")

So x is assigned by 6.



4. Define Mid function to get substring from one string, such as:

MyString S("Hello,world")

MyString Sub

Sub = S.Substring(0, 5) // 0 means start position, 5 means substring s length.

So Sub is saved as "Hello".



5. The client can use MyString you define like as in the main:

void main()

{

MyString S1("Hello"), S2("world"), S3

S3 = S1 + S2

cout << S3 << endl

}-Define MyString class with demands as follows:

0. You CAN NOT use string in the program.

1. MyString can save any string



2. Overload operator+ to append string to another one, such as:

　 MyString S1, S2, S3

　 S1 = S2+ S3



3. Define Find function to locate the position of searching substring, such as:

　 MyString S("Hello,world!")

　 int x = S.Find("world")

　 So x is assigned by 6.



4. Define Mid function to get substring from one string, such as:

　 MyString S("Hello,world")

　 MyString Sub

　 Sub = S.Substring(0, 5)　　// 0 means start position, 5 means substring s length.

　 So Sub is saved as "Hello".



5. The client can use MyString you define like as in the main:

　 void main()

　 {

　　　 MyString S1("Hello"), S2("world"), S3

　　　 S3 = S1+ S2

　　　 cout << S3 << endl

　 }