C语言中将三个数字进行排序的几种写法
网上关于这一问题的写法其实很多,但是很多方法不具有实际的应用价值(比如单纯使用if和else语句写出六种可能做判别),当然这也不失为一种思路,这里仅罗列出三种具有代表性的处理方法(三目运算法、IF比较法、和IF比较的指针写法)
//if语句依次比较大小排序
#include <stdio.h>
int compare(int x,int y,int z)
{
int t=0;
if(x<y)
{
t=x;x=y;y=t;
}
if(y<z)
{
t=y;y=z;z=t;
}
if(x<y)
{
t=x;x=y;y=t;
}
printf("the number from big to small is\n %d %d %d \n",x,y,z);
}
int main()
{
int a,b,c;
printf("please input three numbers \n");
scanf("%d %d %d",&a,&b,&c);
compare(a,b,c);
return 0;
}
//三目运算比大小
#include <stdio.h>
int max(int x,int y,int z)
{
int max=0;
max=x>y?x:y;
max=max>z?max:z;
return max;
}
int smaller(int x,int y,int z)
{
int smaller=0;
smaller=x<y?x:y;
smaller=smaller<z?smaller:z;
return smaller;
}
int middle(int x,int y,int z)
{
int middle=0;
middle=x+y+z-smaller(x,y,z)-max(x,y,z);
return middle;
}
int main()
{
int a,b,c;
printf("please input three numbers \n");
scanf("%d %d %d",&a,&b,&c);
printf("the number from max to small is %d %d %d \n",max(a,b,c),middle(a,b,c),smaller(a,b,c));
return 0;
}
//指针的使用与指针解引用
#include <stdio.h>
int compare(int *x,int *y,int *z)
{
int t;
if(*x<*y)
{
t=*x;*x=*y;*y=t;
}
if(*y<*z)
{
t=*y;*y=*z;*z=t;
}
if(*x<*y)
{
t=*x;*x=*y;*y=t;
}
printf("the number from big to small is\n%d %d %d \n",*x,*y,*z);
}
int main()
{
int a,b,c;
printf("please input three numbers \n");
scanf("%d %d %d",&a,&b,&c);
compare(&a,&b,&c);
return 0;
}