C++ iswlower()用法及代碼示例

iswlower()是C /C++中的內置函數，該函數檢查給定的寬字符是否為小寫字符。它在C++的cwctype頭文件中定義。

用法：

int iswlower(ch)

參數：該函數接受單個強製性參數ch，該參數指定寬字符，我們必須檢查該字符是否為小寫字符。

返回值：該函數返回兩個值，如下所示。

如果參數ch是小寫字符，則返回非零值。
如果不是小寫字符，則返回0。

以下示例程序旨在說明上述函數。

程序1：

// C++ program to illustrate 
// iswlower() function 
#include <cwctype> 
#include <iostream> 
using namespace std; 
  
int main() 
{ 
  
    wchar_t ch1 = 'a'; 
    wchar_t ch2 = 'A'; 
  
    // Function to check if the character 
    // is a lowercase character or not 
    if (iswlower(ch1)) 
        wcout << ch1 << " is a lowercase character "; 
    else
        wcout << ch1 << " is not a lowercase character "; 
    wcout << endl; 
  
    if (iswlower(ch2)) 
        wcout << ch2 << " is a lowercase character "; 
    else
        wcout << ch2 << " is not a lowercase character "; 
  
    return 0; 
}

輸出：

a is a lowercase character 
A is not a lowercase character

程序2：

// C++ program to illustrate 
// iswlower() function 
#include <cwctype> 
#include <iostream> 
using namespace std; 
  
int main() 
{ 
  
    wchar_t ch1 = 'q'; 
    wchar_t ch2 = '?'; 
  
    // Function to check if the character 
    // is a lowercase character or not 
    if (iswlower(ch1)) 
        wcout << ch1 << " is a lowercase character "; 
    else
        wcout << ch1 << " is not a lowercase character "; 
    wcout << endl; 
  
    if (iswlower(ch2)) 
        wcout << ch2 << " is a lowercase character "; 
    else
        wcout << ch2 << " is not a lowercase character "; 
  
    return 0; 
}

輸出：

q is a lowercase character 
? is not a lowercase character

相關用法

注：本文由純淨天空篩選整理自IshwarGupta大神的英文原創作品 iswlower() function in C/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。