How to Remove Specific Item from a Set in C++ - Step by Step Examples

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How to Remove Specific Item from a Set in C++ ?

Answer

To remove a specific item from a set in C++, you can use the erase method to delete the item from the set.

✐ Examples

1 Removing Item from Integer Set

In this example,

We create a set named numberSet using the std::set container from the C++ Standard Library, which contains integer values 1, 2, 3, 4, and 5.
We use the erase method of numberSet to remove the item 3 from the set.
Finally, we iterate through the modified set numberSet to see the removed item.

C++ Program

#include <iostream>
#include <set>

int main() {
    std::set<int> numberSet = {1, 2, 3, 4, 5};
    numberSet.erase(3);

    for (int num : numberSet) {
        std::cout << num << " ";
    }

    return 0;
}

Output

1 2 4 5

2 Removing Item from String Set

In this example,

We create a set named stringSet using the std::set container from the C++ Standard Library, which contains string values 'apple', 'banana', 'cherry', 'date', and 'grape'.
We use the erase method of stringSet to remove the item 'cherry' from the set.
Finally, we iterate through the modified set stringSet to see the removed item.

C++ Program

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

int main() {
    std::set<std::string> stringSet = {"apple", "banana", "cherry", "date", "grape"};
    stringSet.erase("cherry");

    for (const std::string& str : stringSet) {
        std::cout << str << " ";
    }

    return 0;
}

Output

apple banana date grape

Summary

In this tutorial, we learned How to Remove Specific Item from a Set in C++ language with well detailed examples.

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