operator!= (<utility>)

Artikel
07/29/2015

Tests if the pair object on the left side of the operator is not equal to the pair object on the right side.

template<Class Type> 
   bool operator!=( 
      const Type& _Left, 
      const Type& _Right 
   ); 
template<class Type1, class Type2> 
   bool operator!=( 
      const pair<Type1, Type2>& _Left, 
      const pair<Type1, Type2>& _Right 
   );

Parameters

_Left
An object of type pair.
_Right
An object of type pair.

Return Value

true if the pairs are not equal; false if the pairs are equal.

Remarks

One pair is equal to another pair if each of their respective elements is equal. Two pairs are unequal if either the first or the second element of one is not equal to the corresponding element of the other pair.

Example

// utility_op_ne.cpp
// compile with: /EHsc
#include <utility>
#include <iomanip>
#include <iostream>

int main( )
{
   using namespace std;
   pair <int, double> p1, p2, p3;

   p1 = make_pair ( 10, 1.11e-1 );
   p2 = make_pair ( 1000, 1.11e-3 );
   p3 = make_pair ( 10, 1.11e-1 );

   cout.precision ( 3 );
   cout << "The pair p1 is: ( " << p1.first << ", " 
        << p1.second << " )." << endl;
   cout << "The pair p2 is: ( " << p2.first << ", " 
        << p2.second << " )." << endl;
   cout << "The pair p3 is: ( " << p3.first << ", " 
        << p3.second << " )." << endl << endl;

   if ( p1 != p2 )
      cout << "The pairs p1 and p2 are not equal." << endl;
   else
      cout << "The pairs p1 and p2 are equal." << endl;

   if ( p1 != p3 )
      cout << "The pairs p1 and p3 are not equal." << endl;
   else
      cout << "The pairs p1 and p3 are equal." << endl;
}

The pair p1 is: ( 10, 0.111 ).
The pair p2 is: ( 1000, 0.00111 ).
The pair p3 is: ( 10, 0.111 ).

The pairs p1 and p2 are not equal.
The pairs p1 and p3 are equal.

Requirements

Header: <utility>

Namespace: std

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