Question

How to find the length of the second smallest word in a string with C++

Answer 1

#include <algorithm>
#include <iostream>
#include <string>
#include <vector>

int secondSmallestWordLength(const std::string& str) {
    std::vector<std::string> vec;
    std::string word;
    
    for (char ch : str) {
        if (ch == ' ') {
            vec.push_back(word);
            word = "";
        } else {
            word += ch;
        }
    }
    
    vec.push_back(word);
    
    if (vec.size() < 2) {
        return false;
    }
    
    std::vector<int> lengths;
    for (const std::string& word : vec) {
        lengths.push_back(word.length());
    }
    
    std::sort(lengths.begin(), lengths.end());
    
    return lengths[1];
}

int main() {
    std::string str = "java c++ python c# javascript";
    
    std::cout << secondSmallestWordLength(str) << std::endl;
}




/*
run:

3

*/

 

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Answer 2

#include <algorithm>
#include <iostream>
#include <iterator>
#include <sstream>
#include <string>
#include <vector>

int secondSmallestWordLength(const std::string& str) {
    std::istringstream iss(str);
     
    std::vector<std::string> vec;
     
    copy(std::istream_iterator<std::string>(iss),
        std::istream_iterator<std::string>(),
        back_inserter(vec));
    
    if (vec.size() < 2) {
        return false;
    }
    
    std::vector<int> lengths;
    for (const std::string& word : vec) {
        lengths.push_back(word.length());
    }
    
    std::sort(lengths.begin(), lengths.end());
    
    return lengths[1];
}

int main() {
    std::string str = "java c++ python c# javascript";
    
    std::cout << secondSmallestWordLength(str) << std::endl;
}



/*
run:

3

*/

 

70+ SQL courses for beginners and professionals