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/*
  Student:		Colin Redpath
  Class:		CSC-134-301
  Assignment:	Chapter 10 Homework #1
  Due Date:		4/28/2017
  Description:	Sentence Capitalizer (5)
				Write a function that accepts a pointer to a C-string as an argument and capitalizes the first character of each sentence in the strPtring. For instance, if the string argument is “hello. my name is Joe. what is your name?” the function should manipulate the strPtring so it contains “Hello. My name is Joe. What is your name?” Demonstrate the function in a program that asks the user to input a string and then passes it to the function. The modified strPtring should be displayed on the screen.
*/
#include <iostream>
#include <string>
#include <string.h> //needed for strlen
#include <cctype> //needed for char testing
#include <iomanip>
using namespace std;
 
//function prototypes 
string capitalizeFirst(char *);
void resetInput();
 
const int LENGTH = 200; //allocates enough memory for the char array
 
int main()
{
	char input[LENGTH];
 
	//Validate user input
	do {
 
		// Get input from the user to test capitalization function
		cout << "Enter a few sentences, without capitalizing the first word of each sentence.\n";
		cin.getline(input, LENGTH);
 
		if (isdigit(input, LENGTH))
		{
			cout << "Whoops! You must enter letters!\n"
				 << "Enter a few sentences, without capitalizing the first word of each sentence.\n";
			resetInput();
			cin.getline(input, LENGTH);
		}
 
	}while(isdigit(input, LENGTH));
 
	cout << capitalizeFirst(input) << endl;
 
	return 0;
}
 
 
 
 
/********************************************************************
*	Function: string capitalizeFirst(char *strPtr)
*	Purpose: Function accepts a C-string argument entered by the user. The function
			 then capitalizes the first word of every sentence, returning the newly formated 
*	Parameters: char *strPtr - a pointer to a C-string entered by the user. 
*	Return: Returns the new formated pointer strPtr
********************************************************************/
string capitalizeFirst(char *strPtr)
{
	for (int i = 0; i < strlen(strPtr); i++)
	{
		if(ispunct(strPtr[i]) || i == 0)
		{
			if (isalpha(strPtr[i]))
			{	
				strPtr[i] = toupper(strPtr[i]);
			}
 
			if(isspace(strPtr[i+1]))
			{
				strPtr[i+2] = toupper(strPtr[i+2]);
				i += 2;
			}
		}
	}
	return strPtr;
}
 
  /********************************************************************
*	Function: void resetInput()
*	Purpose: This function may be called to reset the input apparatus 
	by flushing the cin buffer. Also 	provides code reuability since
	we are testing multiple input queries
*	Parameters: none
*	Return: none
********************************************************************/
void resetInput()
{
	// flush cin's buffer to start next input request with a clean slate
	cin.clear();
	cin.ignore(100, '\n');
 
}

prog.cpp: In function ‘int main()’:
prog.cpp:33:28: error: no matching function for call to ‘isdigit(char [200], const int&)’
   if (isdigit(input, LENGTH))
                            ^
In file included from /usr/include/c++/6/cctype:42:0,
                 from /usr/include/c++/6/bits/localefwd.h:42,
                 from /usr/include/c++/6/ios:41,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:9:
/usr/include/ctype.h:113:1: note: candidate: int isdigit(int)
 __exctype (isdigit);
 ^
/usr/include/ctype.h:113:1: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/6/bits/basic_ios.h:37:0,
                 from /usr/include/c++/6/ios:44,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:9:
/usr/include/c++/6/bits/locale_facets.h:2601:5: note: candidate: template<class _CharT> bool std::isdigit(_CharT, const std::locale&)
     isdigit(_CharT __c, const locale& __loc)
     ^~~~~~~
/usr/include/c++/6/bits/locale_facets.h:2601:5: note:   template argument deduction/substitution failed:
prog.cpp:33:28: note:   cannot convert ‘LENGTH’ (type ‘const int’) to type ‘const std::locale&’
   if (isdigit(input, LENGTH))
                            ^
prog.cpp:41:30: error: no matching function for call to ‘isdigit(char [200], const int&)’
  }while(isdigit(input, LENGTH));
                              ^
In file included from /usr/include/c++/6/cctype:42:0,
                 from /usr/include/c++/6/bits/localefwd.h:42,
                 from /usr/include/c++/6/ios:41,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:9:
/usr/include/ctype.h:113:1: note: candidate: int isdigit(int)
 __exctype (isdigit);
 ^
/usr/include/ctype.h:113:1: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/6/bits/basic_ios.h:37:0,
                 from /usr/include/c++/6/ios:44,
                 from /usr/include/c++/6/ostream:38,
                 from /usr/include/c++/6/iostream:39,
                 from prog.cpp:9:
/usr/include/c++/6/bits/locale_facets.h:2601:5: note: candidate: template<class _CharT> bool std::isdigit(_CharT, const std::locale&)
     isdigit(_CharT __c, const locale& __loc)
     ^~~~~~~
/usr/include/c++/6/bits/locale_facets.h:2601:5: note:   template argument deduction/substitution failed:
prog.cpp:41:30: note:   cannot convert ‘LENGTH’ (type ‘const int’) to type ‘const std::locale&’
  }while(isdigit(input, LENGTH));
                              ^

Standard output is empty