C++ How to populate a static array of strings with new strings in different locations?

Question

Say I got this

char* MapIds[5000] = { \"Northeast Asia\",\"Hanyang\",\"Pusan\",\"Pyongyang\",\"Shanghai\",\"Beijing\",\"Hong Kong\", /*...5000 values etc../* };
         


        

Answer 1

Because you try to copy into a literal string ("Northeast Asia").

In C++ a literal string is really a constant array of characters, any attempt to modify such an array will lead to undefined behavior (which can sometimes express themselves as crashes).

If you want to make MapIds[0] point to a new string, then you simply use assignment:

MapIds[0] = "gfggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg";

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Because literal strings are constant arrays of characters, C++ doesn't really allow you to have a char* to point to them, you must use const char*:

const char* MapIds[] = { ... };

However, a much better solution is to not use C-style strings and char pointers (const or not) at all, but only use std::string:

std::string MapIds[] = { ... };

Then you can modify the strings in the array itself, using plain assignment as shown above.