CODEWITHSUNDEEP
c++
Aquib
Aquib

Reputation: 3

Splitting of strings

How do I separate the string into two , first one before ","or "." or " " etc and second one after that and then assign both of the to two different variables. for example
string s="154558,ABCDEF; (This is to be inputted by the user ) string a = 154558; //It should be spilt like this after conversion string b =ABCDEF

Upvotes: 0

Views: 104

Answers (2)

reverend X
reverend X

Reputation: 26

I believe it can be something as simple as using rfind + substr

size_t pos = str.rfind('.') 
new_str = str.substr(0, pos);

Essentially what the code is doing is searching for the first '.' and then using substr to extract the substring.

Upvotes: 1

David C. Rankin
David C. Rankin

Reputation: 84521

The two primary ways to split the string on ',' would be (1) create a std::basic_stringstream from the string and then use std::basic_istream::getline with the delimiter of ',' to separate the two strings, e.g.

#include <iostream>
#include <string>
#include <sstream>

int main (void) {
    
    std::string s {"154558,ABCDEF"};
    std::stringstream ss(s);
    std::string sub {};
    
    while (getline (ss, sub, ','))
        std::cout << sub << '\n';
}

Example Use/Output

$ ./bin/str_split_ss
154558
ABCDEF

Or the second and equally easy way would be to use std::basic_string::find_first_of and find the position of ',' within the string and then use the position with std::basic_string::substr to extract the substring on either side of the comma, e.g.

#include <iostream>
#include <string>

int main (void) {
    
    std::string s {"154558,ABCDEF"};
    size_t pos = s.find_first_of (",");
    
    if (pos != std::string::npos) {
        std::cout << "first: " << s.substr(0, pos) << 
                    "\nsecond: " << s.substr(pos+1) << '\n';
    }
}

Example Use/Output

$ ./bin/str_split_find_first_of
first: 154558
second: ABCDEF

Either way works fine. Look things over and let me know if you have further questions.

Upvotes: 1

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