You, could you tell me what this error, the xstring file is not I write, how puzzling error???????
O you teach

CodePudding user response:

You look at the stack, see where it came from, make a mistake

CodePudding user response:

Look at your source code

CodePudding user response:

Strong turned pointer errors, are you sure the incoming pointer to is right?

CodePudding user response:

The upper left corner, click debug - & gt; Window - & gt; The call stack, or press CTRL + Alt + c directly, which is a view code calls the function; After a breakpoint, again see the code of each variable,
Not wrong because you wrote your code calls the library function

CodePudding user response:

On the surface of the String is an error in the underlying code, don't doubt VS, check your code ever crossed, such as null pointer exception error, can step through, or annotation location where the exception happened, in a code block, respectively