Question

Experience with Functions

1. Are the following statements a function header, a prototype or a function call?
   1. double calcMonthlyPmt(double amt);
   2. void displayResults()
   3. void showMenu();
   4. showNum(45.67);
   5. area = CalArea(5,10);

1. Write the function calls for the following headers and prototypes:
   1. void showValue(int quantity)
   2. void display(int arg1, double arg2, char arg3);

pass the following to the call: int age; double income; char initial

3. double calPay(int hours, double rate);

3. What is the output of the following program?

#include <iostream>

using namespace std;

void showDouble(int); //Function prototype

int main()

{

int num;

for (num = 0; num < 10; num++)

showDouble(num);

return 0;

}

// Definition of function showDouble

void showDouble(int value)

{

cout << value << ‘\t’ << (value * 2) << endl;

}

Answer 1

Ans

a) prototype

b) function header

c) prototype

d) function call

e)function call

.

.

showValue(2);

display(age, income, initial);

double output = calPay(2,4.3);

.

.

Output:-

0 0

1 2

2 4

3 6

4 8

5 10

6 12

7 14

8 16

9 18

.//here output ends

prototype have return type written before function name and semicolon at end

function header do not have semicolon at end

function call do not have return type and end with semicolon.

.

function parameters are passed in paranthesis, and return is taken in some variable if not void.

.

the main function has loop that runs from 0 to 10 and call function 10 times. In each call value and its product with 2 is printed separated by tab and line change after print.

.

.

If any doubt ask in the comments.

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.