Modify value of LPWSTR

i am currently developing program with winhttp and getting stuck while modify value of LPWSTR in URL_COMPONENT struct.

I am make simple script that describe my problem

#include <windows.h>
#include <stdio.h>
 
int main(int argc, char const *argv[])
{
  LPWSTR country = L"America, England, Belgium";
  size_t pos = 0;
  while(country[pos] != 44) pos++;
  country[pos] = 0;
  printf("%ls\n", country); // 0x4015b0
  return 0;
}

The program receive signal SIGSEGV in line country[pos] = 0
Thanks in advance

>Solution :

LPWSTR country = L"America, England, Belgium";

country is a pointer to the string literal. Attempt to modify string literal invokes Undefined Behaviour which in your case expresses itself as SEGFAULT.

You need to define modifiable wchar array:

wchar_t country[] = L"America, England, Belgium";

You can also use compound literal to initialize pointer:

LPWSTR country = (wchar_t[]){L"America, England, Belgium"};