in C++ please! 1. Comments at the top of your .cpp file.2. Use only C++ headers. For C++ strings use #include ; forstandard input and output use #include to accessstd::cout; std::cin.3. An example of entering two categories using two string variables isshown below. Modify this code to add a while loop so five categoriescan be entered:std::string categories = ""; std::string category = "";std::cout << "Enter in the category names for your five-bar bar chart:\n";//first category appended to categories std::cin>> category;categories += category + "*";//second category appended to categories std::cin>> category;categories += category + "*";4. Use std::string.find and std::string.substr to extract each categoryname from the string categories using the marker placed during theprevious step. The marker used in the example above was the '*'symbol. Store each category name in a string variable. For example,in the code snippet above the first category name can be retrievedbyint marker_index = categories.find("*");std::string category_one = categories.substr(0,marker_index);5. After each category name is extracted from the categories variable,ask the user to enter in a category amount for each category.6. Compute and store the total amount entered to be used for creatingthe bar chart.7. Create the bar chart using the category names, category amountsand the total using the C++ stream formatting options. While anycombination of stream formatting can be used, do not use any loops(e.g. for, while, etc.) to print out the bar chart symbols. Refer to theincluded references and textbook for how to use std::cout.fill(),std::cout.width(), std::left, std::right and std::cout.precision ().8. To ensure that the bar chart lines up correctly given that eachcategory name may be a different length, use the std::string.size() orstd::string.length() to find the longest category name. Use this lengthto offset the start of drawing the bar.9. Ensure that the number of symbols printed equals the categorypercent of the category. For example if the total is 100, and thecategory amount is 25, then the percent of total is 25/100 * 100 =25% and 25 symbols will be printed for the bar plus the percent labelrounded to the nearest two decimal places. If the percent of totalwas 24.91, then 25 '*"s would print plus the five characters in thepercenatage (24.99). For example,category_one ********category_two *****************25.00*********24.9910. Pause the program so the user has time to inspect the output usingany standard C++ code (e.g. cin, etc.).1

1. Comments at the top of your .cpp file. 2. Use only C++ headers. For C++ strings use #include ; for standard input and output use #include to access std::cout; std::cin. 3. An example of entering two categories using two string variables is shown below. Modify this code to add a while loop so five categories can be entered: std::string categories=""; std::string category= ""; std::cout << "Enter in the category names for your five-bar bar chart: \n"; //first category appended to categories std::cin>> category; categories += category + "*"; //second category appended to categories std::cin>> category; categories += category + "*"; 4. Use std::string.find and std::string.substr to extract each category name from the string categories using the marker placed during the

1. Comments at the top of your .cpp file. 2. Use only C++ headers. For C++ strings use #include ; for standard input and output use #include to access std::cout; std::cin. 3. An example of entering two categories using two string variables is shown below. Modify this code to add a while loop so five categories can be entered: std::string categories=""; std::string category= ""; std::cout << "Enter in the category names for your five-bar bar chart: \n"; //first category appended to categories std::cin>> category; categories += category + ""; //second category appended to categories std::cin>> category; categories += category + ""; 4. Use std::string.find and std::string.substr to extract each category name from the string categories using the marker placed during the

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Header files

A file with an extension that has some predefined declarations and definitions is called a header file. Every computer program imports a set of header files to perform common tasks such as getting input, displaying output, and so forth. Every language has different header files (such as C, JAVA, Python, and C++). In this article, header files are explained mainly in the context of the C/C++ language.

Question

in C++ please!

1. Comments at the top of your .cpp file.
2. Use only C++ headers. For C++ strings use #include <string>; for
standard input and output use #include <iostream> to access
std::cout; std::cin.
3. An example of entering two categories using two string variables is
shown below. Modify this code to add a while loop so five categories
can be entered:
std::string categories = ""; std::string category = "";
std::cout << "Enter in the category names for your five-bar bar chart:
\n";
//first category appended to categories std::cin>> category;
categories += category + "*";
//second category appended to categories std::cin>> category;
categories += category + "*";
4. Use std::string.find and std::string.substr to extract each category
name from the string categories using the marker placed during the
previous step. The marker used in the example above was the '*'
symbol. Store each category name in a string variable. For example,
in the code snippet above the first category name can be retrieved
by
int marker_index = categories.find("*");
std::string category_one = categories.substr(0,marker_index);
5. After each category name is extracted from the categories variable,
ask the user to enter in a category amount for each category.
6. Compute and store the total amount entered to be used for creating
the bar chart.
7. Create the bar chart using the category names, category amounts
and the total using the C++ stream formatting options. While any
combination of stream formatting can be used, do not use any loops
(e.g. for, while, etc.) to print out the bar chart symbols. Refer to the
included references and textbook for how to use std::cout.fill(),
std::cout.width(), std::left, std::right and std::cout.precision ().
8. To ensure that the bar chart lines up correctly given that each
category name may be a different length, use the std::string.size() or
std::string.length() to find the longest category name. Use this length
to offset the start of drawing the bar.
9. Ensure that the number of symbols printed equals the category
percent of the category. For example if the total is 100, and the
category amount is 25, then the percent of total is 25/100 * 100 =
25% and 25 symbols will be printed for the bar plus the percent label
rounded to the nearest two decimal places. If the percent of total
was 24.91, then 25 '*"s would print plus the five characters in the
percenatage (24.99). For example,
category_one ********
category_two *********
********25.00
*********24.99
10. Pause the program so the user has time to inspect the output using
any standard C++ code (e.g. cin, etc.).
1

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