[C]分别用函数和带参的宏，求3个数中的最大值

 

 

//带参宏求3个数的最大值
#include <stdio.h>
#define MAX(a, b, c) (a>b?a:b)>c?(a>b?a:b):c
int main()
{
    int a, b, c;
    puts("input three numbers, use space to seperate each other:");
    scanf("%d%d%d", &a, &b, &c);
    printf("%d\n", MAX(a,b,c));
    return 0;
}

 

 

//用函数求三个数的最大值
#include <stdio.h>
int MAX(int a, int b, int c); //函数声明
int main()
{
    int a, b, c;
    puts("input three numbers, use space to seperate each other:");
    scanf("%d%d%d", &a, &b, &c);
    printf("%d\n", MAX(a,b,c));
    return 0;
}

int MAX(int a, int b, int c)
{
    int max;
    if (a > b)
        max = a;
    else
        max = b;
    if (c > max)
        max = c;
    return max;
}

 

 

//以上两个方法合起来,投机取巧地采用函数求三个数的最大值
#include <stdio.h>
int MAX(int a, int b, int c); //函数声明
int main()
{
    int a, b, c;
    puts("input three numbers, use space to seperate each other:");
    scanf("%d%d%d", &a, &b, &c);
    printf("%d\n", MAX(a,b,c));
    return 0;
}

int MAX(int a, int b, int c)
{
    return (a>b?a:b)>c?(a>b?a:b):c;
}