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

#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; }  

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.

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;

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; }