6.23.47 wcsstr Function

Locates the first occurrence of a wide string in a wide string.

Include

<wchar.h>

Prototype

wchar_t *wcschr(const wchar_t *s1, const wchar_t * s2);

Arguments

s1

the wide string in which to search

s2

the wide string to search for

Return Value

Returns the address of the first element that matches the wide string if found; otherwise, returns a null pointer.

Remarks

This function will find the first occurrence of the wide string s2 (excluding the null terminator) within the string s1. If s2 points to a zero length string, s1 is returned.

Example

See the notes at the beginning of this chapter or section for information on using printf() or scanf() (and other functions reading and writing the stdin or stdout streams) in the example code.

#include <wchar.h>

int main(void)
{
  wchar_t ws1[20] = L"What time is it?";
  wchar_t ws2[20] = L"is";
  wchar_t ws3[20] = L"xyz";
  wchar_t *ptr;
  int res;

  wprintf(L"ws1 : %ls\n", ws1);
  wprintf(L"ws2 : %ls\n", ws2);
  wprintf(L"ws3 : %ls\n\n", ws3);

  ptr = wcsstr(ws1, ws2);
  if (ptr != NULL)
  {
   res = ptr - ws1 + 1;
   wprintf(L"\"%ls\" found at position %d\n", ws2, res);
  }
  else
    wprintf(L"\"%ls\" not found\n", ws2);
  wprintf(L"\n");

  ptr = wcsstr(ws1, ws3);
  if (ptr != NULL)
  {
    res = ptr - ws1 + 1;
    wprintf(L"\"%ls\" found at position %d\n", ws3, res);
  }
  else
    wprintf(L"\"%ls\" not found\n", ws3);
}

Example Output

ws1 : What time is it?
ws2 : is
ws3 : xyz

"is" found at position 11

"xyz" not found