---
layout: post
title: "Problem 2_0"
modified:
categories: /AcceleratedC++/ch2
excerpt:
tags: []
image:
  feature:
date: 2015-09-25T00:37:18-07:00
---

[Github Source](https://github.com/patricknyu/AcceleratedCPlusPlus/tree/master/ch2/Question2_0)

###Q:
Compile and run the program presented in this chapter.

###A:

```c++
#include <iostream>
#include <string>

// say what standard-library names we use
using std::cin;
using std::endl;
using std::cout;
using std::string;

int main()
{
	// ask for the person's name
	cout << "Please enter your first name: ";

	// read the name
	string name;
	cin >> name;

	// build the message that we intend to write
	const string greeting = "Hello, " + name + "!";

	// the number of blanks surrounding the greeting const
	int pad = 1;

	// the number of rows and columns to write
	const int rows = pad * 2 + 3;
	const string::size_type cols = greeting.size() + pad * 2 + 2;

	// write a blank line to separate the output from the input
	cout << endl;

	// write rows rows of output
	// invariant: we have written r rows so far
	for (int r = 0; r != rows; ++r)
	{
		string::size_type c = 0;

		// invariant: we have written c characters so far in the current row
		while (c != cols)
		{
			// is it time to write the greeting?
			if (r == pad + 1 && c == pad + 1)
			{
				cout << greeting;
				c += greeting.size();
			}
			else
			{
				// are we on the border?
				if (r == 0 || r == rows - 1 ||c == 0 || c == cols - 1)
				cout << "*"; else
				cout << " "; ++c;
			}
		}
				cout << endl;
	}
				return 0;
}
```