C How To Program Plus Mylab Programming With Pearson Etext -- Access Card Package (8th Edition)
C How To Program Plus Mylab Programming With Pearson Etext -- Access Card Package (8th Edition)
8th Edition
ISBN: 9780134227023
Author: Paul J. Deitel; Harvey Deitel
Publisher: PEARSON
Textbook Question
Book Icon
Chapter 14, Problem 14.2E

(Variable-Length Argument List: Calculating Products) Write a program that calculates the product of a series of integers that are passed to function product using a variable-length argument list. Test your function with several calls, each with a different number of arguments.

Expert Solution & Answer
Check Mark
Program Plan Intro

Program Plan:

This header file <stdarg.h>is used for object ap of type va_list is used by macros va_startva_arg and va_end to process the variable-length argument list of function product.

product( int x, ) :This function definition product is using a variable length argument list and calculate the product of a series of integers.

Printf (): used to print the data onto output screen.

Variables i, j, l, m, and n are of integer type which are passed as argument to function.

Total variable of integer type is used to store product of integer value.

Program Description: Purpose of the program is to calculates the series of integers that are passed to function product with several calls, by using a variable length list of arguments list and display result.

Explanation of Solution

Program: Following is Cprogram that calculates the series of integers that are passed to function product with several calls, by using a variable length list of arguments list and display result.

#include<stdio.h>//header file
#include<stdarg.h>///header-file for variable-length argument lists 
//Function prototype  
int product( int x, ... );
//Start of main  
intmain( void ) 
{
//Initialize the integers 
inti = 5;
int j = 4;
int k = 3;
int l = 2;
int m = 1;
//display user the values of integers
printf( "%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n","i = ",
i, "j = ", j,"k = ", k,"l = ", l, "m = ", m );
//display the result of product using the function call to different series of integers 
printf( "%s%d\n%s%d\n%s%d\n%s%d\n",
"The Product of i and j is: ", product( 2,i,j ),
"The Product of i, j and k is: ",product(3,i,j,k ),
"The Product of i, j, k and 1 is: ", product(4,i,j,k,l ),
"The Product of i, j, k, 1, and m is: ",product(5,i,j,k,l,m) );
//terminate program succesfully
return0;

}//End of main  

//function product in which product of integers is passed as arguments
int product( int x, ... ) 
{
//Declare and initialize variable total
int total = 1;
//variable to counter loop
intz;

//Stores information needed by va_start and va_end. 

/*initialize variable Length argument List*/
va_listarg;

//Stores information needed by va_start. 

/*invoke the macros to access the arguments*/
va_start( arg, x );

//Process is running for variable length argument list. 

/*evaluate the total using for loop*/
for( z = 1; z <= x ; z++ ) 
    { 
        total *= va_arg( arg, int);
    }/*end of for loop*/


//Clean up variable-length argument list. 

/*Perform the housekeeping termination*/
va_end( arg);

/*return the arguments of product*/
returntotal;

}/*end of function Product*/

Explanation:

  • Use header file notation for variable-length list of arguments.
  • Read different series of integers in function call.
  • Assign the value of total equals to 1 and use the argument list including va_list of variable list, next initialize va_start ( ) to invoke the macros so as to access the arguments in function definition.
  • Loop for to evaluate the value of product.
  • Display the product of a series of integers.

Sample Output:

  C How To Program Plus Mylab Programming With Pearson Etext -- Access Card Package (8th Edition), Chapter 14, Problem 14.2E

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
05:38
Students have asked these similar questions
Consider the following database for some store: Customers (cid, cname, city, discount)Agents (aid, aname, city, percent)Products (pid, pname, city, quantity, price)Orders (ordno, mon, cid, aid, pid, qty, dollars) The relation Customers records the ID (cid), name (cname), location (city) of each customer and a discount percentage (discount) for this customer. The relation Agents records the ID (aid), name (aname), location (city) of each agent and a transaction fee (percent) charged by this agent. The relation Products lists the ID (pid), name (pname), location (city), quantity and price of available products. And finally, the relation Orders contains a unique order number (ordno), the month (mon), customer (cid), agent (aid), product (pid), quantity (qty) of each order as well as the total value (dollars) of the transaction.   1. Express the following query in SQL (a) List customers (names) who do not have discounts but purchased at least one product of price greater than $50. (b) Find…
Consider the following relational schema and briefly answer the questions that follow:   Emp(eid: integer, ename: string, age: integer, salary: real)  Works(eid: integer, did: integer, pct_time: integer)  Dept(did: integer, budget: real, managerid: integer)      a. Define a table constraint on Dept that will ensure that all managers have age > 30. b. Write SQL statements to delete all information about employees whose salaries exceed that of the manager of one or more departments that they work in. Be sure to ensure that all the relevant integrity constraints are satisfied after your updates.
Consider the following relations:     Student(snum: integer, sname: string, rmajor: string,          level: string, age: integer)   Class(cname: string, meets_at: time, room: string, fid: integer)   Enrolled(snum: integer, cname: string)   Faculty(fid: integer, fname: string, deptid: integer)     The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class.     2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint.   (a) Every faculty member must teach at least two courses. (b) Every student must be enrolled in the course called 'Math101'. (c) A student cannot add more than two courses at a time…

Additional Engineering Textbook Solutions

Find more solutions based on key concepts
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
Text book image
C++ for Engineers and Scientists
Computer Science
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Course Technology Ptr
Text book image
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,