Absolute C++ Chapter 4 Self-Test Exercise(1)

1.A call-by-value parameter is a local variable. When the function is invoked, the value of a callby-

value argument is computed and the corresponding call-by-value parameter (which is a
local variable) is initialized to this value.

2.yes

3.

10 20 30

1 2 3

1 20 3

4. the first won't change to the second, but the second will become as the first.

5.

void zeroBoth(int& num1,int& num2)
{

　　num1=0;

　　num2=0;

}

6.

void addTax(double taxRate, double& cost)
{
　　cost*=(1+taxRate/100.0)
}

 

7. it won't change to 222 the second argument.

8.int score(double points);

9.double theAnswer(double data1, double data2);