6.54 (Find the Error) Determine whether the following program segments contain errors. For each error, explain how it can be corrected. [Note: For a particular program segment, its possible that no errors are present in the segment.]

a) template < class A >

int sum( int num1, int num2, int num3 )

{

return num1 + num2 + num3;

}

b) void printResults( int x, int y )

{

cout << The sum is << x + y << ;

return x + y;

}

c) template < A >

A product( A num1, A num2, A num3 )

{

return num1 * num2 * num3;

}

d) double cube( int );

int cube( int );