#include #include #include #include "console.h"#include "strlib.h"#include "filelib.h"#include "vector.h"#include "SimpleTest.h" using namespace std; /* This function is intended to return a string which * includes only the letter characters from the original * (all non-letter characters are excluded) * * WARNING: The provided code is buggy! * * Use test cases to identify which inputs to this function * are incorrectly handled. Then, remove this comment and * replace it with a description of the bug you fixed. *//* string lettersOnly(string s) { string result = charToString(s[0]); for (int i = 1; i < s.length(); i++) { if (isalpha(s[i])) { result += s[i]; } } return result;}*/ string lettersOnly(string s) { string result = ""; result += s[0]; for (int i = 1; i < s.length(); i++) { if (isalpha(s[i])) { result += s[i]; } } return result;} string soundex(string s) { /* TODO: Fill in this function. */ return "";} void soundexSearch(string filepath) { // This provided code opens the specified file // and reads the lines into a vector of strings ifstream in; Vector allNames; if (openFile(in, filepath)) { readEntireFile(in, allNames); } cout << "Read file " << filepath << ", " << allNames.size() << " names found." << endl; }

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C-string

A string is a one-dimensional array of characters that can be terminated using a null character (‘\0’). The string or character array is used to manipulate the text such as words or sentences. The \0 (termination character) is the most important in the string as it is the only method to identify the end of the string. A string can be defined as a one-dimensional array of characters; whereas, an array of strings is a two-dimensional array of characters.