How can I assign pointer member with long string?

Question

When I did the practice below to erase my pointer member and assign new value to it.

(*pMyPointer).member.erase();
(*pMyPointer).member.assign("Hello"); // Successfully

Than I tried more...

(*pMyPointer).member.erase();
(*pMyPointer).member.assign("Long Multi Lines Format String"); // How to?

If the long multi lines string can't quote by double quoter, how to handle it. Thank you.

Am I right to assume you want to know how to write a string literal with line breaks in it? What's that got to do with pointers? — sbi, May 18 '10 at 07:32
Maybe he had a gut feeling there's a better way to access a member inside a pointer, and subtly asked for a comment about it. — wilhelmtell, May 18 '10 at 07:35
possible duplicate of [C++ multiline string literal](http://stackoverflow.com/questions/1135841/c-multiline-string-literal) — Paul R, May 18 '10 at 07:44
I see, he wants some kind of "block" delimiter. Wrong language... — egrunin, May 18 '10 at 07:55
@Nano: I meant **C++** is the wrong language, it doesn't do what you want, where some others might. — egrunin, May 18 '10 at 09:53

score 3 · Accepted Answer · answered May 18 '10 at 07:33

I really have no clue what you are trying to ask. Maybe this:

(*pMyPointer).member.assign("Long Multi Lines Format String"
                            "more lines that will be"
                            "concatenated by the compiler");

Or did you mean line breaks like this:

(*pMyPointer).member.assign("Long Multi Lines Format String\n"
                            "more lines that will be\n"
                            "concatenated by the compiler");

score 2 · Answer 2 · answered May 18 '10 at 07:31

2

Line breaks in string literals are '\n':

"This is a string literal\nwith a line break in it."

answered May 18 '10 at 07:31

sbi

219,715
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score 2 · Answer 3 · answered May 18 '10 at 07:32

I assume you mean passing a very long string constant as a parameter, in which case C++ does the string-merging for you: printf("hello, " "world"); is the same thing as printf("hello, world");

Thus:

(*pMyPointer).member.assign("Long Multi Lines Format String "
       "and here's more to the string "
       "and here's more to the string "
       "and here's more to the string "
       "and here's more to the string "
       "and here's more to the string ");

score 1 · Answer 4 · answered May 18 '10 at 13:51

I think the question is is how to create a multi-line string.

You can easily do it with:

(*pMyPointer).member.assign(
    "Long Multi Lines Format String" \
    "Long Multi Lines Format String" \
    "Long Multi Lines Format String"
 );

You'll have to add a \n to the string if you want to return. Otherwise it's going to stay on the same line.

How can I assign pointer member with long string?

4 Answers4