numeric_limits::is_signed
Tests if a type has a signed representation.
static const bool is_signed = false;
Return Value
true if the type has a signed representation; false if not.
Remarks
The member stores true for a type that has a signed representation, which is the case for all predefined floating-point and signed integer types.
Example
// numeric_limits_is_signaled.cpp
// compile with: /EHsc
#include <iostream>
#include <limits>
using namespace std;
int main( )
{
cout << "Whether float objects have a signed representation: "
<< numeric_limits<float>::is_signed
<< endl;
cout << "Whether double objects have a signed representation: "
<< numeric_limits<double>::is_signed
<< endl;
cout << "Whether signed char objects have a signed representation: "
<< numeric_limits<signed char>::is_signed
<< endl;
cout << "Whether unsigned char objects have a signed representation: "
<< numeric_limits<unsigned char>::is_signed
<< endl;
}
Whether float objects have a signed representation: 1 Whether double objects have a signed representation: 1 Whether signed char objects have a signed representation: 1 Whether unsigned char objects have a signed representation: 0
Requirements
Header: <limits>
Namespace: std