6.23.34 wcscmp Function

Compare two wide strings.

Include

<wchar.h>

Prototype

int wcscmp(const wchar_t * restrict s1, const wchar_t * restrict s2);

Arguments

s1

one wide string to compare

s2

the other wide string to compare

Return Value

Returns a positive integer if s1 is greater than s2, zero if s1 is equal to s2 or a negative number if s1 is less than s2.

Remarks

The function returns a value based on the first wide character that differs between s1 and s2. Wide characters that follow a null wide character are not compared.

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 buf1[50] = L"Where is the time?";
  wchar_t buf2[50] = L"Where did they go?";
  wchar_t buf3[50] = L"Why?";
  int res;

  wprintf(L"buf1 : %ls\n", buf1);
  wprintf(L"buf2 : %ls\n", buf2);
  wprintf(L"buf3 : %ls\n\n", buf3);

  res = wcscmp(buf1, buf2);
  if (res < 0)
    wprintf(L"buf1 comes before buf2\n");
  else if (res == 0)
    wprintf(L"buf1 and buf2 are equal\n");
  else
   wprintf(L"buf2 comes before buf1\n");
  wprintf(L"\n");

  res = wcscmp(buf1, buf3);
  if (res < 0)
    wprintf(L"buf1 comes before buf3\n");
  else if (res == 0)
    wprintf(L"buf1 and buf3 are equal\n");
  else
    wprintf(L"buf3 comes before buf1\n");
  wprintf(L"\n");

  res = wcscmp(L"Why?", buf3);
  if (res < 0)
    wprintf(L"\"Why?\" comes before buf3\n");
  else if (res == 0)
    wprintf(L"buf1 and \"Why?\" are equal\n");
  else
    wprintf(L"buf3 comes before \"Why?\"\n");
}

Example Output

buf1 : Where is the time?
buf2 : Where did they go?
buf3 : Why?

buf2 comes before buf1

buf1 comes before buf3

buf1 and "Why?" are equal