does anyone have an answer for this cause its been bugging me for some time
why is it that when a call the sizeof operator on the name of an array without the [] it returns the size of the entire array. I mean if the name of the array without the [] operator is a pointer to the first element in the array how come it does not just return the size of the pointer?

Quote: if the name of the array without the [] operator is a pointer to the first element in the array

Repeat after me, "an array is not a pointer", 100 times. If your book equates the two, it has oversimplified, to the point that the devil in the details has snared you. The array-pointer relationship is tricky, so don't feel bad about having difficulty understanding it.

You may find the C-FAQ entry relevant. A number of entries concern the array pointer relationship actually.

If the C-FAQ looks like gibberish to you, or you aren't still clear on why sizeof works the way it does with arrays, make a post in the beginner's forum on it.

Sort of stuck here. Was wondering for any help? Reading Files and storing them in arrays for modifications.

Quote:

00001,Telephone Jacks,10.75,15.00
00002,Phone Starter Kit,5.25,7.50
00003,Home base module,1.00,2.50
4,Boring School Textbook,2,5
5,Exciting School Textbook,6,7
06,Really Great Examination Answers,5.1,15.4
07,True Examination Answers,1.35,9.99
08,Home Grown Term Paper,1.25,10.75
54,Z-Top Cook Stove,12.50,107.50

Reading files is much easier in C. What i wanted to do is read the file byte by byte. I dont think i can do this in C++ so im forced to "stream it up".


i dont need to print anything to the file so im using ifstream inFile;
Dynamic Allocation is not an issue for me, but after this is solved i would like to learn :)



What im trying to do at this point is to loop through the file using an integer varaible. Breaking to the next line after each comma. Then store what i've read in an array and finally converting each number to a single digit.

#include <iostream>

using namespace std;

int main()

//Function to initialize an int array to 0.
//The array to be initialized and its size are passed
//as parameters. The parameter listSize specifies the
//number of elements to be initialized.

void initializeArray(int list[], int listSize)
{
int index;

for (index = 0; index < listSize; index++)
list[index]= 0;
}

//Function to read and store the data into an int array.
//The array to store the data dn its zie are passed as
//parameters. The parameters listSize specifies the number
//of elements to be read.
void fillArray(int list[], int listSize)
{
int index;

for (index = 0; index < listSize; index++)
cin >> list[index];

}

//Function to print the elements of an int array.
//The array to be printed and the number of elements
//are passed as parameters. The parameter listSize
//specifies the number of elements to be printed.

void printArray(const int list[], int listSize)
{
int index;

for (index = 0; index < listSize; index++)
cout << list[index] << " ";
}

//Function to find and return the sum of the
//elements of an int array. The parameter listSize
//specifies the number of elements to be added.
int sumArray(const int list[], int listSize)
{


int index;
int sum = 0;

for (index = 0; index < listSize; index++)
sum = sum + list[index];

return sum;
}


//Function to find and return the index of the first
//largest element in an int array. The parameter listSize
//specifies the number of elements in the array.

int indexLargestElement(const int list[], int listSize)
{
int index;
int maxIndex=0; //assume the first element is the largest

for (index = 1; index < listSize; index++)
if (list[maxIndex] < list [index])
maxIndex = index;

return maxIndex;
}

//Function to copy one array into another array.
//The elements of listOne are copied into listTwo.
//The array listTwo must be at least as large as the
//number of elements to be copied. The parameter
//listOneSize specifies the number of elements of
//listOne to be copied into listTwo.

void copyArray(const int listOne[], int listTwo[],
int listOneSize)
{

int index;

for (index = 0; index < listOneSize; index++)
listTwo[index] = listOne[index];


}


I got this error ->>>>>


error C2144: syntax error : 'void' should be preceded by ';'

Can somebody tell me what I did wrong?

Quote: Original post by rip-off
You have "int main()" floating by itself at the top. If you were to follow that with a semicolon, that would be a declaration of main (which is unnecessary, because it is illegal to explicitly call main() in C++).

You should probably provide a definition of main() towards the end of your program. You could even provide some tests to make sure your functions work.

Umm... okay. Actually, if you are just starting to learn C++ and cannot "tango" with it yet, then always place your main() below all your other code.

However, if you get better in coding, you might want to declare function prototypes instead, which is a "somewhat" advanced stuff for beginners. But if you do that, your main can be anywhere you want as long as it's under those prototypes and the code will still work.