Programming Forums > Application Development > C++

n00b · Feb 17th, 2006, 8:30 AM

hello everyone..
first of all lemme just post a few lines of code so that it's easier to explain the "problem".

int main()
{
	int n;
	int index[100];
	float average[100];
	char name[100][20];

	while((n<0) || (n>100))
	{
		cout << "How many students?" << endl;
		cin >> n;

		while(!cin)
		{
			cin.clear();
			cin.ignore(100,'\n');
			cout << "Input the NUMBER of students" << endl;
			cin >> n;
			cin.get();
		}
	}.......

so...my question is regarding the char name variable. let's say if i was using dynamic array..i would first ask for the number of students (cin >> n

, and then create a pointer to a variable...

(Toggle Plain Text)

char (*name)[30] = new char[n][30];

but now...since i'm using static array, how do i do that? first defining the variable char name[100][30] (for eg 100 is the number of students), and THEN asking for the number of students doesn't make any sense does it? because...what if i answer that there are 200 students and the array is set to 100 ??

could be a stupid question but i've been using 99% dynamic allocation lately.

DaWei · Feb 17th, 2006, 8:59 AM

Quote:

... and THEN asking for the number of students doesn't make any sense does it?

Only if the number is less than (or equal to) the number you've allocated for. You might want it just to terminate the gathering of input. Personally (individual choice), I'd just go for "Press ENTER on a blank line to terminate entry" and stop input that way, with a safety exit if the number of entries exceeded what I'd allocated for.

Feb 17th, 2006, 8:30 AM	#1
n00b Programmer Join Date: Sep 2005 Posts: 69 Rep Power: 4	static array... hello everyone.. first of all lemme just post a few lines of code so that it's easier to explain the "problem". (Toggle Plain Text) int main() { int n; int index[100]; float average[100]; char name[100][20]; while((n<0) \|\| (n>100)) { cout << "How many students?" << endl; cin >> n; while(!cin) { cin.clear(); cin.ignore(100,'\n'); cout << "Input the NUMBER of students" << endl; cin >> n; cin.get(); } }....... int main() { int n; int index[100]; float average[100]; char name[100][20]; while((n<0) \|\| (n>100)) { cout << "How many students?" << endl; cin >> n; while(!cin) { cin.clear(); cin.ignore(100,'\n'); cout << "Input the NUMBER of students" << endl; cin >> n; cin.get(); } }....... so...my question is regarding the char name variable. let's say if i was using dynamic array..i would first ask for the number of students (cin >> n, and then create a pointer to a variable... (Toggle Plain Text) char (name)[30] = new char[n][30]; char (name)[30] = new char[n][30]; but now...since i'm using static array, how do i do that? first defining the variable char name[100][30] (for eg 100 is the number of students), and THEN asking for the number of students doesn't make any sense does it? because...what if i answer that there are 200 students and the array is set to 100 ?? could be a stupid question but i've been using 99% dynamic allocation lately.

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Programming Forums > Application Development > C++

static array...