请问要怎么把图中的printf（）改成cout

请问要怎么把图中的printf（）改成cout？
真的搞不明白！

首先，你得有C++编译器；其次引入iostream

#include <iostream>
using namespace std;

cout << "Please input:" << endl;
cint >> a >> b >> c;

cout << "a =" << a << " , b =" << b << " , c =" << c << endl;
cout << "area of triangle is " << area <<endl;