C++ iswgraph()用法及代碼示例

iswgraph()是C /C++中的內置函數，該函數檢查給定的寬字符是否具有圖形表示。它在C++的cwctype頭文件中定義。默認情況下，以下字符是圖形：

位數(0至9)
大寫字母(從A到Z)
小寫字母(a至z)
標點符號(！”＃$％&'()* +，-./:;?@[\]^_`{|}~)

用法：

int iswgraph(ch)

參數：該函數接受單個強製性參數ch，該參數指定寬字符，我們必須檢查該寬字符是否具有圖形表示。

返回值：該函數返回兩個值，如下所示。

如果ch具有圖形表示字符，則返回非零值。
如果它不是圖形表示字符，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 
// iswgraph() function 
#include <cwctype> 
#include <iostream> 
using namespace std; 
  
int main() 
{ 
  
    wchar_t ch1 = '?'; 
    wchar_t ch2 = ' '; 
  
    // Function to check if the character 
    // has a graphical representation or not 
    if (iswgraph(ch1)) 
        wcout << ch1 << " has graphical representation "; 
    else
        wcout << ch1 << " does not have graphical representation "; 
    wcout << endl; 
  
    if (iswgraph(ch2)) 
        wcout << ch2 << " has graphical representation "; 
    else
        wcout << ch2 << " does not have graphical representation "; 
  
    return 0; 
}

輸出：

? has graphical representation 
  does not have graphical representation

程序2：

// C++ program to illustrate 
// iswgraph() function 
#include <cwctype> 
#include <iostream> 
using namespace std; 
  
int main() 
{ 
  
    wchar_t ch1 = ' '; 
    wchar_t ch2 = '3'; 
  
    // Function to check if the character 
    // has a graphical representation or not 
    if (iswgraph(ch1)) 
        wcout << ch1 << " has graphical representation "; 
    else
        wcout << ch1 << " does not have graphical representation "; 
    wcout << endl; 
  
    if (iswgraph(ch2)) 
        wcout << ch2 << " has graphical representation "; 
    else
        wcout << ch2 << " does not have graphical representation "; 
  
    return 0; 
}

輸出：

does not have graphical representation 
3 has graphical representation

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 iswgraph() in C/C++ with Examples。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。