C++ iswgraph()用法及代码示例

iswgraph()是C /C++中的内置函数，该函数检查给定的宽字符是否具有图形表示。它在C++的cwctype头文件中定义。默认情况下，以下字符是图形：

位数(0至9)
大写字母(从A到Z)
小写字母(a至z)
标点符号(！”＃$％&'()* +，-./:;?@[\]^_`{|}~)

用法：

int iswgraph(ch)

参数：该函数接受单个强制性参数ch，该参数指定宽字符，我们必须检查该宽字符是否具有图形表示。

返回值：该函数返回两个值，如下所示。

如果ch具有图形表示字符，则返回非零值。
如果它不是图形表示字符，则返回0。

以下示例程序旨在说明上述函数。

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; 
}

输出：

? 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; 
}

输出：

does not have graphical representation 
3 has graphical representation

相关用法

注：本文由纯净天空筛选整理自IshwarGupta大神的英文原创作品 iswgraph() in C/C++ with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。