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pointers and chars

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Join Date: Oct 2007

Posts: 49

Reputation: helixkod is an unknown quantity at this point

Solved Threads: 1

helixkod

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pointers and chars

Nov 22nd, 2007

Heres my current code:

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                const int SIZE = 100;		//constant 100
	const int COL = 30;			//number of columns
	int testScores[SIZE];		//test score array
	char students[SIZE][COL];	//student names array
	int numTests;				//the number of tests
	char *namePtr;				//char pointer
	int *numPtr;				//number pointer
	int count;					//counter
 
	numPtr = testScores;		//sets the pointer to testScores
	namePtr = students;                  //set the pointer to students
                const int SIZE = 100;		//constant 100
	const int COL = 30;			//number of columns
	int testScores[SIZE];		//test score array
	char students[SIZE][COL];	//student names array
	int numTests;				//the number of tests
	char *namePtr;				//char pointer
	int *numPtr;				//number pointer
	int count;					//counter

	numPtr = testScores;		//sets the pointer to testScores
	namePtr = students;                  //set the pointer to students

can pointers not be set to a char?
if that is the case should i just use an array?

I was told to use pointers whenever possible, i just don't know if a char pointer is possible.

Last edited by helixkod; Nov 22nd, 2007 at 7:05 pm.

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Join Date: Oct 2007

Posts: 1,953

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Duoas

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Re: pointers and chars

Nov 22nd, 2007

> I was told to use pointers whenever possible
In C++ you should avoid both.

> i just don't know if a char pointer is possible.
Did you try compiling your code above? Did it complain about a char * ?

You can make a pointer to anything.

You'd be better off, though, using a std::string:

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#include <string>
using namespace std;
 
string students[ SIZE ];
#include <string>
using namespace std;

string students[ SIZE ];

Of course, you have to keep track of how many students you actually have, and you can never have more than SIZE students.

You'd be best off, then, using a std::vector or std::deque:

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#include <string>
#include <vector>
using namespace std;
 
vector<string> students;
 
students.push_back( "Jayne" );
students.push_back( "Ronnie" );
students.push_back( "Hannah" );
 
cout << "The students' names are:\n";
for (int i = 0; i < students.size(); i++)
  cout << student[ i ] << endl;
#include <string>
#include <vector>
using namespace std;

vector<string> students;

students.push_back( "Jayne" );
students.push_back( "Ronnie" );
students.push_back( "Hannah" );

cout << "The students' names are:\n";
for (int i = 0; i < students.size(); i++)
  cout << student[ i ] << endl;