The function of absolute value in C language

Turn from: http://blog.csdn.net/chaoi/archive/2007/09/18/1790515.aspx

/* ABS. C:this program computes and displays * the absolute values of several numbers. * * #include <stdio.h> #include <math.h> #include <stdlib.h> void main (void) {int ix = -4, iy long LX = -41567l, ly; Double dx = -3.141593, dy; IY = ABS (ix); printf ("The absolute value of%d is%d/n", IX, IY); ly = Labs (LX); printf ("The absolute value of%ld is%ld/n", LX, ly); DY = fabs (dx); printf ("The absolute value of%f is%f/n", DX, DY); Output the absolute value of-4 is 4 the absolute value of-41567 are 41567 the absolute value of-3.141593 is 3.141593