1. Passing Arrays to functions
Dr. Khizar Hayat
Associate Prof. of Computer Science

2. #include<iostream>
using namespace std;
void fun2(int);
int c=3;
int main() {
int a=1;
int c=4;
c=c/2;
cout<<"The value of c is"<<c<<endl;
fun2(c);
fun2(::c);
if(a<10)
int c=7; }
c++;
::c=::c+3;
cout<<"The value of c is"<<::c<<endl;
return(0);
void fun2(int x) {
int c;
c=x*x;
cout<<"The value of c is"<<c<<endl;
::c++;
cout<<"The value of c is"<<::c<<endl; }

3. Array as a parameter to a function
The identifier of an array refers to its address.
Arrays can only be passed to functions, by reference and not by value
In a function declaration, array parameters are specified by data type followed by empty [ ] – the name of array identifier is optional, e.g.
void display(int[]); OR
void display(int b[]);
The function display() takes an array parameter b of type int.
In a function call, you would pass just the identifier of the array as argument.

4. Passing Array to Function: Example
#include <iostream> using namespace std; void print(int[],int); int main () { int a[20],n,i; cout<<“Enter the no. of elements of the array“<<endl; cin>>n; for (i=0;i<n;i++) cout<<“Enter the value of ith element”<<endl; cin>>a[i]; } print(a,n); //see next slide for definition return 0;

5. Passing Array to Function: Example contd…
void print(int b[],int m) { int i; for (i=0;i<m;i++) cout<<“The value of b[“<<i<<“] is ”<<b[i]<<endl; }