#include<stdio.h>int main(){int a,b,c,d;scanf("%d %d %d",&a,&b,&c);if(a<b){d=a;a=b;b=d;}if(b<c){d=b;b=c;c=d; }if(a<b){d=a;a=b;b=d;}printf("%d",b);return 0;}如果a=9;b=8;c=7程序怎么運算的