Macro Trouble

Hi, i'm having touble with this macro. The compiler is telling me that I have a stray backslash. I'm new to this preprocessor stuff and haven't been able to find a good, straightforward guide to it. How can I clean up this piece of code?

Code:

#define MAX(x, y, z)             \                               \
{                                \
        int t = x;               \
        if (y > t)               \
                t = y;           \
        if (z > t)               \
                t = z;           \
        return t;                \
}

int main()
{
        int a = 1, b = 2, c = 3;

        printf("\n%i\n\n", MAX(a,b,c));


        return 0;
}

The compiler yelled, "

Code:

[fl76a06@cisweb ex05]$ make
cc    -c -o ex05.o ex05.c
ex05.c: In function `main':
ex05.c:22: error: stray '\' in program
ex05.c:22: error: syntax error before '{' token
ex05.c:22: error: `t' undeclared (first use in this function)
ex05.c:22: error: (Each undeclared identifier is reported only once
ex05.c:22: error: for each function it appears in.)
ex05.c: At top level:
ex05.c:22: error: syntax error before ')' token
make: *** [ex05.o] Error 1

."

You are using MAX as if it was an expression, but it is not an expression, as it is enclosed in curly braces. You also have a return, which is meaningless because this is not a function. You need:

Code:

#define MAX(a, b) ((a)>=(b)?(a):(b))
#define MAX3(a, b, c) MAX(MAX(a, b), c)

Thank you brew.