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16-Bit Language Tools Libraries
getenv (Continued)
Example:
#include <stdio.h> /* for printf, NULL */
#include <stdlib.h> /* for getenv */
int main(void)
{
char *incvar;
incvar = getenv("INCLUDE");
if (incvar != NULL)
printf("INCLUDE environment variable = %s\n",
incvar);
else
printf("Cannot find environment variable "
"INCLUDE ");
}
Output:
Cannot find environment variable INCLUDE
labs
Description:
Include:
Prototype:
Calculates the absolute value of a long integer.
<stdlib.h>
long labs(long i );
Argument:
i
long integer value
DS51456E-page 102
Return Value:
Remarks:
Example:
Returns the absolute value of i .
A negative number is returned as positive; a positive number is
unchanged.
#include <stdio.h> /* for printf */
#include <stdlib.h> /* for labs */
int main(void)
{
long i;
i = 123456;
printf("The absolute value of %7ld is %6ld\n",
i, labs(i));
i = -246834;
printf("The absolute value of %7ld is %6ld\n",
i, labs(i));
i = 0;
printf("The absolute value of %7ld is %6ld\n",
i, labs(i));
}
Output:
The absolute value of 123456 is 123456
The absolute value of -246834 is 246834
The absolute value of 0 is 0
? 2008 Microchip Technology Inc.
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