C++ wcschr()用法及代碼示例

C++中的wcschr()函數在寬字符串中搜索寬字符的首次出現。終止的null寬字符被視為字符串的一部分。因此，還可以定位它以便檢索指向寬字符串末尾的指針。

用法:

const wchar_t* wcschr (const wchar_t* ws, wchar_t wc)
      wchar_t* wcschr (      wchar_t* ws, wchar_t wc)

參數：該函數接受兩個強製性參數，如下所述：

ws:指向要搜索的空終止的寬字符串的指針
wc:要定位的寬字符

返回值：該函數返回兩個值，如下所示：

指向字符串中字符首次出現的指針。
如果找不到字符，則函數返回空指針。

以下示例程序旨在說明上述函數：
程序1:

// C++ program to illustrate 
// wcschr() function 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    // initialize wide string 
    wchar_t ws[] = L"This is some good coding"; 
  
    wchar_t* point; 
    wprintf(L"Looking for the 'o' character in \"%ls\"...\n", ws); 
  
    // initialize the search character 
    point = wcschr(ws, L'o'); 
  
    // search the place and print 
    while (point != NULL) { 
        wprintf(L"found at %d\n", point - ws + 1); 
        point = wcschr(point + 1, L'o'); 
    } 
  
    return 0; 
}

輸出：

Looking for the 'o' character in "This is some good coding"...
found at 10
found at 15
found at 16
found at 20

程序2:

// C++ program to illustrate 
// wcschr() function 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    // initialize wide string 
    wchar_t ws[] = L"geekforgeeks"; 
  
    wchar_t* point; 
    wprintf(L"Looking for the 'g' character in \"%ls\"...\n", ws); 
  
    // initialize the search character 
    point = wcschr(ws, L'g'); 
  
    // search the place and print 
    while (point != NULL) { 
        wprintf(L"found at %d\n", point - ws + 1); 
        point = wcschr(point + 1, L'g'); 
    } 
  
    return 0; 
}

輸出：

Looking for the 'g' character in "geekforgeeks"...
found at 1
found at 8

相關用法

注：本文由純淨天空篩選整理自AmanSrivastava1大神的英文原創作品 wcschr() function in C++。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。