版权声明:本文为博主原创文章,未经博主允许不得转载 https://blog.csdn.net/qit1314/article/details/90046049
书中页数:P74
代码名称:add_using.cc
#include <iostream>
// using declarations for names from the standard library
using std::cin;
using std::cout; using std::endl;
int main()
{
cout << "Enter two numbers:" << endl;
int v1, v2;
cin >> v1 >> v2;
cout << "The sum of " << v1 << " and " << v2
<< " is " << v1 + v2 << endl;
return 0;
}