C / C++中的iswupper()函数

iswupper()是C / C++中的内置函数，它检查给定的宽字符是否为大写字符。它在CPP头文件中定义，并且此函数与isupper( )。

句法：

int iswupper(wint_t rs)

参数：该函数接受单个必需参数rs ，该参数指定要检查的宽字符。

返回值：该函数返回两个值，如下所示：

• 非零值-如果rs具有大写字符
• 零–如果rs没有大写字符

下面的程序说明了上述函数。
程序1：

// C++ program to illustrate
// iswupper() function
#include 
using namespace std;
int main()
{
  
    wchar_t rs1 = 'S';
    wchar_t rs2 = 's';
  
    // Function to check if the character
    // is a uppercase character or not
    if (iswupper(rs1))
        wcout << rs1 << " is a uppercase character ";
    else
        wcout << rs1 << " is not a uppercase character ";
    wcout << endl;
  
    if (iswupper(rs2))
        wcout << rs2 << " is a uppercase character ";
    else
        wcout << rs2 << " is not a uppercase character ";
  
    return 0;
}

输出：

S is a uppercase character 
s is not a uppercase character

程式2：

// C++ program to illustrate
// iswupper() function
#include 
using namespace std;
int main()
{
  
    wchar_t rs1 = 'R';
    wchar_t rs2 = '@';
  
    // Function to check if the character
    // is a uppercase character or not
    if (iswupper(rs1))
        wcout << rs1 << " is a uppercase character ";
    else
        wcout << rs1 << " is not a uppercase character ";
    wcout << endl;
  
    if (iswupper(rs2))
        wcout << rs2 << " is a uppercase character ";
    else
        wcout << rs2 << " is not a uppercase character ";
  
    return 0;
}

输出：

R is a uppercase character 
@ is not a uppercase character

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