char_traits::eq

测试两 char_type 字符是否相等。

static bool eq(
   const char_type& _Ch1, 
   const char_type& _Ch2 
);

参数

• _Ch1
  用于相等要测试的第一个字符。

• _Ch2
  用于相等要测试的两个字符。

返回值

true，如果第一个字符与第二个字符相等;否则 false。

示例

// char_traits_eq.cpp
// compile with: /EHsc
#include <string>
#include <iostream>

int main( ) 
{
   using namespace std;

   char_traits<char>::char_type ch1 =  'x';
   char_traits<char>::char_type ch2 =  'y';
   char_traits<char>::char_type ch3 =  'x';

   // Testing for equality
   bool b1 = char_traits<char>::eq ( ch1 , ch2 );
   if ( b1 )
      cout << "The character ch1 is equal "
           << "to the character ch2." << endl;
   else
      cout << "The character ch1 is not equal "
           << "to the character ch2." << endl;

   // An equivalent and alternatively test procedure
   if ( ch1 == ch3 )
      cout << "The character ch1 is equal "
           << "to the character ch3." << endl;
   else
      cout << "The character ch1 is not equal "
           << "to the character ch3." << endl;
}

要求

标头: <string>

命名空间: std

请参见

参考

char_traits Struct