_chgsign, _chgsignl

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Header File

float.h

Prototype

double _chgsign(double d);
long double _chgsignl(long double ld);

Description

Reverses the sign of a double-precision floating-point argument, d.

_chgsignl is the long double version; it takes a long double argument and returns a long double result.

Return Value

Returns a value of the same magnitude and exponent as the argument, but with the opposite sign. There is no error return value.

Portability

	POSIX	ANSI C	ANSI C++	Win32	Win64	OS X
_chgsign				+
_chgsignl				+

Example

#include <float.h>
#include <stdio.h>
 
int _tmain(int argc, _TCHAR* argv[]) {
	double number;
 
	printf("Enter a double value: ");
	scanf("%lf", &number);
 
	printf("Value with the chnaged sign is: %lf\n", '' '_chgsign' ''(number));
 
	return 0;
}