计算三个数的最大值与最小值

// HOngT.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#define MAX(a,b,c) ((((a>b)?(a):(b))>c)?((a>b)?(a):(b)):(c))
#define MIN(a,b,c) ((((a<b)?(a):(b))<c)?((a<b)?(a):(b)):(c))

int _tmain(int argc, _TCHAR* argv[])
{
    int x,y,z;
    printf("pelease putin your three numbers: \n");
    scanf("%d %d %d",&x,&y,&z);
    printf("MAX = %d\n",MAX(x,y,z));
    printf("MIN = %d\n",MIN(x,y,z));
    return 0;
}

以上是用宏设计进行计算的；

// MAX.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"


int _tmain(int argc, _TCHAR* argv[])
{
    int x,y,z;
    printf("pelease putin your three numbers: \n");
    scanf("%d %d %d",&x,&y,&z);
    if((x == y) && (x == z)){
        printf("MAX = %d,%d,%d\n",x,y,z);
        printf("MIN = %d,%d,%d\n",x,y,z);}else if((x == y) && (x > z)){
        printf("MAX = %d,%d\n",x,y);
        printf("MIN = %d\n",z);}else if((x == y) && (x < z)){
            printf("MAX = %d\n",z);
            printf("MIN = %d,%d\n",x,y);}else if((x == z) && (x > y)){
        printf("MAX = %d,%d\n",x,z);
        printf("MIN = %d\n",y);}else if((y == z) && (y > x)){
        printf("MAX = %d,%d\n",y,z);
        printf("MIN = %d\n",x);}else if(x>y){
        if(x>z){
            printf("MAX = %d\n",x);if(y>z){
                printf("MIN = %d\n",z);}else{
                printf("MIN = %d\n",y);}}else{
            printf("MAX = %d\n",z);
            printf("MIN = %d\n",y);}}else if(x<y){
        if(y>z){
            printf("MAX = %d\n",y);
            if(x>z){
                printf("MIN = %d\n",z);}else{
                printf("MIN = %d\n",x);}}else{
            printf("MAX = %d\n",z);
            printf("MIN = %d\n",x);}}
    return 0;
}

以上是选择语句实现。