MAX - Man Page

Standard C library (libc, -lc)

#include <sys/param.h>

MAX(a, b);
MIN(a, b);

These macros return the maximum or minimum of a and b.

These macros return the value of one of their arguments, possibly converted to a different type (see Bugs).

These macros may raise the "invalid" floating-point exception when any of the arguments is NaN.

GNU, BSD.

If either of the arguments is of a floating-point type, you might prefer to use fmax(3) or fmin(3), which can handle NaN.

The arguments may be evaluated more than once, or not at all.

Some UNIX systems might provide these macros in a different header, or not at all.

Due to the usual arithmetic conversions, the result of these macros may be very different from either of the arguments. To avoid this, ensure that both arguments have the same type.

#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>

int
main(int argc, char *argv[])
{
    int a, b, x;

    if (argc != 3) {
        fprintf(stderr, "Usage: %s <num> <num>\n", argv[0]);
        exit(EXIT_FAILURE);
    }

    a = atoi(argv[1]);
    b = atoi(argv[2]);
    x = MAX(a, b);
    printf("MAX(%d, %d) is %d\n", a, b, x);

    exit(EXIT_SUCCESS);
}

fmax(3), fmin(3)

The man page MIN(3) is an alias of MAX(3).