abs, _abs64
Visual Studio 2005
Calculate the absolute value.
int abs( int n ); long abs( long n ); // C++ only double abs( double n ); // C++ only long double abs( long double n ); // C++ only float abs( float n ); // C++ only __int64 _abs64( __int64 n );
Parameters
- n
-
Integer value.
| Routine | Required header | Compatibility |
|---|---|---|
| abs | <stdlib.h> or <math.h> | ANSI, Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 |
| _abs64 | <stdlib.h> | Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 |
This program computes and displays the absolute values of several numbers.
// crt_abs.c
// This program demonstrates the user of the abs function
// by computing and displaying the absolute values of
// several numbers.
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
int main( void )
{
int ix = -4,
iy;
long lx = -41567L,
ly;
double dx = -3.141593,
dy;
__int64 wx = -1, wy;
// absolute 64 bit integer value
wy = _abs64( wx );
printf_s( "The absolute value of %I64x is %I64x\n", wx, wy);
// absolute 32 bit integer value
iy = abs( ix );
printf_s( "The absolute value of %d is %d\n", ix, iy);
// absolute long integer value
ly = labs( lx );
printf_s( "The absolute value of %ld is %ld\n", lx, ly);
// absolute double value
dy = fabs( dx );
printf_s( "The absolute value of %f is %f\n", dx, dy );
}
Output
The absolute value of ffffffffffffffff is 1 The absolute value of -4 is 4 The absolute value of -41567 is 41567 The absolute value of -3.141593 is 3.141593
