get the first letter of each word in a string using c++

Question

Example of what I am trying to do:

String = "This Is My Sentence"

I am looking to get this as a result: "TIMS", which takes only first letter of every word.

I am struggling with C++.

http://stackoverflow.com/a/237280/1056003 This answer does most of the work for you already — nikolas, Aug 22 '13 at 09:03
The question itself is not so bad. If only you had bothered to post some of you code, you would have upvotes — MarsOne, Aug 22 '13 at 09:09
use this link. develop some code and then repost if you have issues http://www.cplusplus.com/reference/regex/regex_search/ — MarsOne, Aug 22 '13 at 09:11

score 0 · Answer 1 · answered Aug 22 '13 at 09:01

0

Try using std::string and it's find function.

answered Aug 22 '13 at 09:01

Paul Evans

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score 0 · Accepted Answer · edited May 23 '17 at 11:51

0

cout<<myString[0];
for(int i=0;i<(myString.size-1);i++)
        { if(myString[i]==" ")
          {
           cout<< myString[i+1];
          {
        }

I didn't checked if it compiles that way but you schould get the idea of this possible simple solution. It will only work with strings similar to your example. You should take a look at the Split Method like others already suggested.

edited May 23 '17 at 11:51

Community

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answered Aug 22 '13 at 09:22

David_D

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I dont need to check your solution to tell you that it will not work. Sorry for being brutally honest – MarsOne Aug 22 '13 at 09:57
Would you kindly tell me where my idea is wrong? Only Problem I see if the String has multiple Spaces in a row but it should work in given the example. – David_D Aug 22 '13 at 10:10
This will not work for the first letter itself. No need to explain further. – MarsOne Aug 22 '13 at 10:17
Thank you for that Hint I didn't thought about that. My intention was to show the questioner that you can use a string like an array since he seems like a beginner. I will edit the Solution. – David_D Aug 22 '13 at 10:23

score 0 · Answer 3 · edited May 23 '17 at 12:00

0

Split it by spaces to an array, use a for loop to get each word and add the fist letter to a string.

Split

For loop

In the loop to get the fist value just do "string_word[0]"

edited May 23 '17 at 12:00

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answered Aug 22 '13 at 09:22

mont_

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score 0 · Answer 4 · answered Aug 22 '13 at 09:58

Have a look at Boost Tokenizer - the code should look somehow like this (not tested):

std::string firstLetters(const std::string& str)
{
    std::string result="";
    typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
    boost::char_separator<char> sep(" ");
    tokenizer tokens(str, sep);

    for (tokenizer::iterator tok_iter = tokens.begin();
        tok_iter != tokens.end(); ++tok_iter)
            {
                if (tok_iter->size>0)
                {
                    result+=(*tok_iter)[0];
                }
            } 
    return result;
}

Alternatively, you can also use Boost String Algorithms (again untested)

std::string firstLetters(std::string& str)
{
    std::string result="";
    std::vector<std::string> splitvec;
    boost::split( splitvec, str, boost::is_any_of(" "), boost::token_compress_on );

    //C++11:  for (std::string &s : splitvec)
    BOOST_FOREACH(std::string &s, splitvec)
    {
        if (s.size()>0)
        {
            result+=s[0];
        }
    }
    return result;
}

For completeness I should mention the strtok function, but this is more C than C++ ;-)

*Jost

@nijansen only a little bit ;-)... Yes you're right, but imagine next time a solution for multiple delimiters is needed and I don't want to see a call of the `find` function for each delimiter (also think about multiple white space characters). It is simply the more powerful approach - that's why I posted it. — Jost, Aug 22 '13 at 14:56

get the first letter of each word in a string using c++

4 Answers4