unable to print string value using sprintf in c++

Question

i have function that takes two parameters of type LPTSTR, and i am trying print both the values using sprintf like below and i am not able to print the exact values.

int __stdcall Logon(LPTSTR UserName, LPTSTR Password)
{
  char Buffer[2048];
  sprintf(Buffer,"UserName: %s\n m_Password: %s\n",UserName,Password);
  FILE *Ls=fopen("lo.log",a);
  fprintf(Ls,Buffer);
  fclose(Ls);
}

Viktor Latypov · Accepted Answer · 2012-05-29 14:42:39Z

4

Either fix "Use Unicode strings" in you project settings or use the

_stprintf(Buffer, _T("UserName: %S\n m_Password: %S\n"), UserName, Password);

and

#include <tchar.h>

If you use Unicode (and you do), use the '%S' format.

edited May 29, 2012 at 14:42

answered May 29, 2012 at 13:40

Viktor Latypov

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2 Comments

krishna555 Over a year ago

thank you for your quick response but modifying the sprintf this way is just giving me the first characters of the string not the entire string.

Viktor Latypov Over a year ago

Please, give us the complete code (namely the LPTSTR vars definition - Buffer, UserName, Password)

Joel Rondeau · Accepted Answer · 2012-05-29 14:15:09Z

2

Assuming that UserName and Password are stored as wide strings (wchar_t) and you are trying to put them into a char[] buffer, then visual c++ uses %S to accomplish this.

sprintf(Buffer,"UserName: %S\n m_Password: %S\n",UserName,Password);

answered May 29, 2012 at 14:15

Joel Rondeau

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