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
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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.
Transcribed Image Text: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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