iswlower()是C / C++中的内置函数,它检查给定的宽字符是否为小写字符。它在C++的cwctype头文件中定义。
语法:
int iswlower(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为小写字符。
返回值:该函数返回两个值,如下所示。
- 如果参数ch是小写字符,则返回非零值。
- 如果不是小写字符,则返回0。
下面的程序说明了上述函数。
程序1 :
// C++ program to illustrate
// iswlower() function
#include
#include
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;
}
输出:
a is a lowercase character
A is not a lowercase character
程序2 :
// C++ program to illustrate
// iswlower() function
#include
#include
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;
}
输出:
q is a lowercase character
? is not a lowercase character
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