#include<iostream> using namespace std; int main(){ /** char s; int a; cin>>s; a = s; cout<<a; int a; char z; cin>>a; z = a; cout<<z; **/ /** char a,l; cin>>a>>l; cout<<a+l;//字符做加法， 是对应ASCII码相加 char a; int r; cin>>a; r = a; cout<<r; float a; cin>>a; cout<<a*9/5+32;**/ float a,w; cin>>a>>w; cout<<a*w; return 0; }