Answer Posted / chinna

in Pass by value; if any change in variable in the sub-
function may not reflected to the main function. where as
in pass by reference the change in the variable may reflect
to the original value in the main funtion.

ex : // Pass by Reference

void Get( int &nIndex){
nIndex = 10;
}

void main()
{
int x = 100;
cout<<Get( x );
}

o/p : 10;

ex : // Pass by Value

void Get( int nIndex){
nIndex = 10;
}

void main()
{
int x = 999;
cout<<Get( x );
}

o/p : 999

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