[C]parameterized macros 带参数的宏

/*
请写成下列宏定义
1.min(a,b) 求a,b的最小值
2.islower(c), 判断c是否为小写字母
3.isleap(year), 判断year是否为闰年
4.circumference(r), 计算半径为r的圆周长
*/
#include <stdio.h>
#define min(a,b) ((a)>(b)?(a):(b))
#define isLower(c) (((c) < ‘z‘ && (c) > ‘a‘)? "True": "False")
#define isLeap(year) (((((year)%4==0&&(year)%100!=0)||(year)%400==0)? "True": "False"))
#define PI 3.14159265
#define circumference(r) (2*PI*(r))

int main()
{
    printf("%s\n", isLeap(2004));
    printf("%s\n", isLeap(100));
    printf("%f\n", circumference(4));
    printf("%c\n", min(‘z‘, ‘A‘));
    printf("%d\n", min(100, 67));
    printf("%s\n", isLower(‘A‘));
    return 0;
}