//  Purpose: Show how strchr() finds a character in a C-style string
//  Author:  Dr Keith Shomper
//  Date:    9 Oct 2008
#include <iostream>
using namespace std;

int main () 
{
	const int  BUF_SIZE = 80;
	
	char      *s, s1[BUF_SIZE];
	char	   c;
	string     s2;
	int        pos;

	// Get a string
	cout << "Please enter a string:  ";
	getline(cin, s2, '\n');

	// Copy the standard string s2 into the character array s1
	strcpy(s1, s2.c_str());

	// Ask for a character to locate in s1
	cout << "Please enter a character to locate:  ";
	cin  >> c;
	
	// Locate the first character represented by c in s1
	s = strchr(s1, c);

	// Compute the position of character c
	if (s == NULL) {
		// In this case, the character we were looking for was not present
		cout << "There is no '" << c << "' in \"" << s1 << "\"\n";
	} else {
		// s1 is the beginning of the string we are searching, s is were we need
		// to get to in that string.  The position is the far s is from the
		// beginning of the string (and distances are found by subtraction)
		pos = s - s1;
		cout << "The position of the first '" << c << "' in \"" << s1 << "\" is " 
		     << pos << endl;
	}

   return 0;
}