I have a string variable that holds the full name of someone (ex. string fullName = "John Smith", how do I split that string and put the first and last name into separate string variables? I know to search for the space is a good way to start I'm just not sure how to go about doing this.
(ex. string fullName = "John Smith"; )***
I would put the string into an std::stringstream and use std::getline to extract words by specifying the delimiter as a space.
I know this is probably overkill but I wrote a little utility code a couple years ago that splits up an input string into a series of tokens (output as a vector of strings). It might be helpful to you:
Code:#include <string> #include <vector> /** * Splits a string up into a series of tokens (output as a string vector). * * @param sourceStr The string to split up. * * @param delimiter What to delimit the source string by. * * @param ignoreEmpty Whether or not to ignore empty tokens. * (usually created by 2 or more immediately * adjacent delimiters) * * @return A string vector containing a series of ordered tokens. */ std::vector<std::string> split(const std::string &sourceStr, const std::string &delimiter, bool ignoreEmpty) { std::vector<std::string> resultVector; size_t idxA = 0; size_t idxB = sourceStr.find(delimiter); std::string tempStr; bool done = false; while(!done) { if(idxB != std::string::npos) { tempStr = sourceStr.substr(idxA, idxB-idxA); idxA = idxB + delimiter.length(); idxB = sourceStr.find(delimiter, idxA); } else { tempStr = sourceStr.substr(idxA); done = true; } if(!(ignoreEmpty && tempStr.empty())) resultVector.push_back(tempStr); } return resultVector; }
Use string::iterator for this. Here's an example usage.Originally Posted by mborba22
That is certainly feasible, but as demonstrated by ajs15822, std::string's own find functions are index based, as is substr. Elkvis' suggestion is probably the easiest to implement.
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There is also Boost's string algorithms, which among others, contain a split function. Handy stuff. Something all programmers would benefit from.
it's already been said but use stringstreams:
Outputs:Code:#include <iostream> #include <string> #include <sstream> using namespace std; int main() { string Token, ToParse("one two three four five"); istringstream StrStream(ToParse); while (StrStream) { getline(StrStream, Token, ' '); cout << Token << endl; } /* //Alternatively: while (StrStream >> Token) { cout << Token << endl; } */ return 0; }
one
two
three
four
five
Or you really could just do something like this:
FirstName and LastName will always be valid strings regardless of what FullName isCode:#include <iostream> #include <string> #include <sstream> using namespace std; int main() { string FullName("John Smith"); string FirstName, LastName; istringstream StrStream(FullName); StrStream >> FirstName; StrStream >> LastName; cout << FirstName << endl; cout << LastName << endl; return 0; }
Last edited by BMJ; 10-01-2010 at 04:46 PM. Reason: added another example
