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C6305

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warning C6305: potential mismatch between sizeof and countof quantities

This warning indicates that a variable holding a sizeof result is being added to or subtracted from a pointer or countof expression. This will cause unexpected scaling in pointer arithmetic.

Example

The following code generates this warning:

void f(int *p) 
{ 
  int cb=sizeof(int); 
  //code... 
  p +=cb; // warning 6305
}

To correct this warning, use the following code:

void f(int *p) 
{
  // code...
  p += 1; 
}