CODEWITHSUNDEEP
string
rishi_harshan
rishi_harshan

Reputation: 21

methods for comparing strings with numbers

I have been doing some string problems. The problem now is to check if a ip is valid or not. for example 255.6.13.4. The ip is stored in a string.Now i have to check whether the numbers lie between 0 to 255. Is there any way to split the ip and compare with numbers or any other way around it. thanks in advance

Upvotes: 1

Views: 35

Answers (1)

anastaciu
anastaciu

Reputation: 23832

Use stringstreams and std::getline(), it has a delimiter parameter.

Link to live sample

#include <iostream>
#include <sstream>
#include <vector>

int main()
{
    std::string str = "123.231.0.43";

    std::stringstream test(str);
    std::string temp;
    int temp_int;
    std::vector<int> addr_elements; //int vector, you can use a string vector if you prefer

    while (std::getline(test, temp, '.')) //split by delimiter '.'
    {   

        std::stringstream ssint(temp);
        ssint >> temp_int;     //string to int
        addr_elements.push_back(temp_int); //now you have a vector of integers
    }

    for(int i : addr_elements){ //test print the vector
        std::cout << i << " ";
    }
}

Upvotes: 1

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