这段话怎么理解
#include "stdio.h"
void main()
{ int a,b,c,t;
printf("Input three numbers:");
scanf("%d%d%d",&a,&b,&c);
printf("a=%d,b=%d,c=%d\n",a,b,c);
if(a>b) {t=a;a=b;b=t;}
if(a>c) {t=a;a=c;c=t;}
if(b>c) {t=b;b=c;c=t;}
printf("MAX=%d\n",c);
}
带红色的这段怎么理解、、