(1)有两个瓶子A和B,分别盛有醋和酱油,要求它们互换(即A瓶原来盛醋,现改盛酱油,B瓶则相反).
 ①#include
   int main(){
   int A,B,t;
   scanf("%d%d",&A,&B);
   t=A;
   A=B;
   B=t;
   printf("%d %d\n",A,B);
   return 0;
  }
 ②#include
  void a(int A,int B){
   int t;
   t=A;
   A=B;
   B=t;
   printf("%d %d\n",A,B);
  }
  int main(){
   int A=2;
   int B=3;
   a(A,B);
  }
原文:https://www.cnblogs.com/cylf/p/10567552.html