How to Convert a Set of Strings to a Set of Integers in C++ - Step by Step Examples

How to Convert a Set of Strings to a Set of Integers in C++ ?

Answer

In C++, you can convert a set of strings to a set of integers using stringstream.


✐ Examples

1 Convert a Set of Strings to a Set of Integers using Stringstream

In this example,

  1. We have a set named stringSet1 containing the elements '1', '2', '3', '4', '5'.
  2. We iterate through each element in stringSet1.
  3. For each element, we use stringstream to convert the string to an integer and add it to intSet1.
  4. We print the resulting intSet1 to the console.

C++ Program

#include <iostream>
#include <set>
#include <sstream>

int main() {
    std::set<std::string> stringSet1 = {"1", "2", "3", "4", "5"};
    std::set<int> intSet1;
    for (const std::string& str : stringSet1) {
        std::stringstream ss(str);
        int num;
        ss >> num;
        intSet1.insert(num);
    }
    for (int num : intSet1) {
        std::cout << num << " ";
    }
    return 0;
}

Output

1 2 3 4 5

2 Convert a Set of Strings to a Set of Integers using stoi() Function

In this example,

  1. We have a set named stringSet2 containing the elements '10', '20', '30', '40', '50'.
  2. We iterate through each element in stringSet2.
  3. For each element, we use the stoi() function to convert the string to an integer and add it to intSet2.
  4. We print the resulting intSet2 to the console.

C++ Program

#include <iostream>
#include <set>
#include <string>

int main() {
    std::set<std::string> stringSet2 = {"10", "20", "30", "40", "50"};
    std::set<int> intSet2;
    for (const std::string& str : stringSet2) {
        int num = std::stoi(str);
        intSet2.insert(num);
    }
    for (int num : intSet2) {
        std::cout << num << " ";
    }
    return 0;
}

Output

10 20 30 40 50

Summary

In this tutorial, we learned How to Convert a Set of Strings to a Set of Integers in C++ language with well detailed examples.


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