类函数宏

/*
 ============================================================================
 Name        : kinson.c
 Author      : 
 Version     :
 Copyright   : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <stdio.h>
#include <stdlib.h>

#define ok(x) x*x
#define okk(x) (x)*(x)

int main(void)
{
    int a = 2;
    int b = 3;
    int c = ok(a+b);//6+5=11
    //int c = a+b*a+b;
    int d = okk(a+b);//
    //int d = (a+b)*(a+b)
    printf("ok(a+b)= a+b*a+b=%d
",c);
    printf("okk(a+b)= (a+b)*(a+b)=%d
",d);//5*5=25
    return EXIT_SUCCESS;
}