This code attempts to find a given string within another string, matching the given string exactly.

CaseSensitiveWholeWordMatch.cpp

// #FixMyCode
// This code attempts to find a given string within another string, matching the given string exactly.
// Can you make it more correct, more elegant, faster, or just plain better? If so, please do!
// Fork this Gist and tweet me the result @joshuampeterson.
#include <string>
#include <iostream>

bool IsWordDelimiter(char character)
{
    return character == ' ' || character == '.' || character == ',' || 
           character == ';' || character == '?' || character == '!' || 
           character == ':' || character == '/' || character == '(' ||
           character == ')' || character == '"';
}

bool IsStringToFindInStringToSearchMatchingWholeWord(std::string stringToSearch,
                                                     std::string stringToFind)
{
    size_t position = stringToSearch.find(stringToFind);
    while (position != std::string::npos)
    {
        if ((position == 0 || IsWordDelimiter(stringToSearch[position-1])) && 
            (position + stringToFind.size() == stringToSearch.size() || 
             IsWordDelimiter(stringToSearch[position + stringToFind.size()])))
        {
            return true;
        }

        position = stringToSearch.find(stringToFind, position + 1);
    }

    return false;
}

void Validate(bool expectedOutput, std::string stringToSearch, std::string stringToFind)
{
    bool actualOutput = IsStringToFindInStringToSearchMatchingWholeWord(stringToSearch, stringToFind);
    if (expectedOutput == actualOutput)
        if (actualOutput)
            std::cout << "Success: \"" << stringToFind << "\" found" << std::endl;
        else
            std::cout << "Success: \"" << stringToFind << "\" not found" << std::endl;
    else
        if (actualOutput)
            std::cout << "Error: \"" << stringToFind << "\" not found" << std::endl;
        else
            std::cout << "Error: \"" << stringToFind << "\" found" << std::endl;
}

void main()
{
    std::string gettysburgAddress = "Four score and seven years ago our fathers brought"
                                    " forth on this continent, a new nation, conceived in"
                                    " Liberty, and dedicated to the proposition that all"
                                    " men are created equal.";
    
    std::cout << "String to search: " << gettysburgAddress << std::endl;
    Validate(true, gettysburgAddress, "fathers");
    Validate(false, gettysburgAddress, "father");
    Validate(true, gettysburgAddress, "all men are created equal");
    Validate(false, gettysburgAddress, "Four score and seven year");
}