How to Find an Element in an Array in C ?

Finding an Element in an Array in C

Checking for the presence of a specific element within an array is a common programming task. In Java, this can be accomplished using the equals() method and null checks. However, in C , there is no direct equivalent of null checking for objects.

To resolve this, C employs the std::find algorithm, which searches a range of elements for a given value. By utilizing this function, you can verify whether an element exists in an array, as illustrated below:

Foo array[10];
... // Initialize the array

Foo* foo = std::find(std::begin(array), std::end(array), someObject);

if (foo != std::end(array)) {
    // Element found
    cerr << "Found at position " << std::distance(array, foo) << endl;
} else {
    // Element not found
    cerr << "Not found" << endl;
}

The std::find algorithm returns an iterator pointing to the first occurrence of the specified element within the specified range. If the element is not found, it returns an iterator pointing to the end of the range. By comparing the returned iterator to the end of the array, you can determine whether the element was found or not.

The above is the detailed content of How to Find an Element in an Array in C ?. For more information, please follow other related articles on the PHP Chinese website!