Array as an argument

[echo.zyw]

Hey guys,

I have a question about the following code. Any advice for me? Thanks in advance. :)

Code:

2 #include <iostream>
3 using namespace std;
4
5 int printarray(int (&array)[4],n){
6 cout << "Outputing from printarray func. " << endl;
7 for (int i = 0; i < 4; i++){
8 cout << array[i] << endl;
9 }
10 return n;
11 }
12
13 int main(){
14 int b[] = {1, 2, 3, 4};
15 int *a;
16 a = b;
17
18 cout << printarray(b,5) << endl;
19 return 0;
20 }

g++ -o a a.ccp error:

a.cpp:5:22: error: ‘array’ was not declared in this scope
a.cpp:5:32: error: ‘n’ was not declared in this scope
a.cpp:5:33: error: expression list treated as compound expression in initializer [-fpermissive]
a.cpp:5:34: error: expected ‘,’ or ‘;’ before ‘{’ token

But if I write function printarray(int (&array)[4],n) as printarray(int (&array)[4]), then it will work well for me. Any idea why the above error happened?

[karlson]

First off use <code> tags

Second. Why not declare function as

int printarray(int *array, int n)

[echo.zyw]

Thank you for your advice.

Yes. That will work. But I would like to have a look at the use of reference. I just checked my code again. I find where the problem is: I didn't claim "n" as "int n" in the function...

It is working now. Thank you~~~


First off use <code> tags

Second. Why not declare function as

int printarray(int *array, int n)

[DaviesX]

Actually, it works except the omitting of int :)

And except code tag should be used, please don't copy the line number too :mad:



#include <iostream>
using namespace std;

int printarray ( int (&array)[4], int n ) // int can't be omitted ...
{
cout << "Outputing from printarray func. " << endl;

for (int i = 0; i < 4; i++)
{
cout << array[i] << endl;
}

return n;
}

int main()
{
int b[] = {1, 2, 3, 4};
int *a;
a = b;

cout << printarray ( b, 5 ) << endl;
return 0;
}

[echo.zyw]

Gotcha. Thank you, sir.


Actually, it works except the omitting of int :)

And except code tag should be used, please don't copy the line number too :mad:



#include <iostream>
using namespace std;

int printarray ( int (&array)[4], int n ) // int can't be omitted ...
{
cout << "Outputing from printarray func. " << endl;

for (int i = 0; i < 4; i++)
{
cout << array[i] << endl;
}

return n;
}

int main()
{
int b[] = {1, 2, 3, 4};
int *a;
a = b;

cout << printarray ( b, 5 ) << endl;
return 0;
}