Question

How to find the longest string size in array of strings in C++

Answer 1

#include <iostream>
#include <cstring>
#include <algorithm>

int main() {
    const size_t ROWS = 5, COLS = 10;
    char arr[ROWS][COLS] = {"c++", "c#", "python", "java", "php"}; 
    
    auto longestString = std::max_element(arr, arr + ROWS - 1, [](const auto& s1, const auto& s2){
                                return strlen(s1) < strlen(s2);
                        });

    size_t maxSize = strlen(longestString[0]);

    std::cout << maxSize;

    return 0;
}



/*
run:

6

*/

 

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Answer 2

#include <iostream>
#include <algorithm>

int main() {
    std::string arr[] = {"c++", "c#", "python", "java", "php"}; 
    
    auto longestString = std::max_element(std::begin(arr), std::end(arr),
                    [](std::string &s1, std::string &s2){return s1.size() < s2.size();});

    std::cout << longestString->size();
    
    return 0;
}



/*
run:

6

*/

 

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