REVIEW - Functions and Streams In this worksheet, you will practice writing functions involving problems that use streams (stringstreams, file streams) and String methods (find, substr) Exercise 1 Following is a code snippet for a program that reads several lines from a file¹. It prints words ignoring commas and whitespace in each line. Lastly, it prints the number of such words. //Extract each line while (getline(namelFS, line)) { } int count = 0; //From the line, extract words up to comma istringstream lineSS(line); string words; while (getline(lineSS, words, ',')) { //Extract each word from the words string word2; istringstream wordSS(words); while (wordSS >> word2) { } cout << word2 << " "; ++count; } cout << count << endl; Example file data.txt: why did the chicken cross the playground? Because, it wanted to go to the other slide! Ha, ha ha ha " Output file data_parse.txt: why did the chicken cross the playground? 7 Because it wanted to go to the other slide! 9 Ha ha ha ha 4 Let us divide the above code into two functions and rewrite it. Such a process is called refactoring (which you also did for the last problem in Lab 03). The two functions you need to write are in the following two pages.

REVIEW - Functions and Streams In this worksheet, you will practice writing functions involving problems that use streams (stringstreams, file streams) and String methods (find, substr) Exercise 1 Following is a code snippet for a program that reads several lines from a file¹. It prints words ignoring commas and whitespace in each line. Lastly, it prints the number of such words. //Extract each line while (getline(namelFS, line)) { } int count = 0; //From the line, extract words up to comma istringstream lineSS(line); string words; while (getline(lineSS, words, ',')) { //Extract each word from the words string word2; istringstream wordSS(words); while (wordSS >> word2) { } cout << word2 << " "; ++count; } cout << count << endl; Example file data.txt: why did the chicken cross the playground? Because, it wanted to go to the other slide! Ha, ha ha ha " Output file data_parse.txt: why did the chicken cross the playground? 7 Because it wanted to go to the other slide! 9 Ha ha ha ha 4 Let us divide the above code into two functions and rewrite it. Such a process is called refactoring (which you also did for the last problem in Lab 03). The two functions you need to write are in the following two pages.

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

Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.

Question

REVIEW - Functions and Streams
In this worksheet, you will practice writing functions involving problems that use streams
(stringstreams, file streams) and String methods (find, substr)
Exercise 1
Following is a code snippet for a program that reads several lines from a file¹. It prints words
ignoring commas and whitespace in each line. Lastly, it prints the number of such words.
//Extract each line
while (getline(namelFS, line))
{
int count = 0;
//From the line, extract words up to comma
istringstream lineSS(line);
string words;
while (getline(lineSS, words, ','))
{
//Extract each word from the words
string word2;
istringstream wordSS(words);
while (wordSS >> word2)
{
}
cout << word2 << " ";
++count ;
}
cout << count << endl;
Example file data.txt:
why did the chicken cross the playground?
Because, it wanted to go to the other slide!
Ha, ha, ha ha
Output file data_parse.txt:
why did the chicken cross the playground? 7
Because it wanted to go to the other slide! 9
Ha ha ha ha 4
Let us divide the above code into two functions and rewrite it. Such a process is called
refactoring (which you also did for the last problem in Lab 03). The two functions you need to
write are in the following two pages.

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