How to Find the Maximum or Minimum Value in a C Vector or Array?

Finding Maximum or Minimum Values in a Vector or Array

Question:

How can the maximum or minimum value be obtained from a vector in C ? Would the same approach work for an array?

Solution:

In C , several methods are available for finding the maximum or minimum value in a vector or array.

Vectors:

To determine the maximum or minimum value within a vector, utilize the max_element() or min_element() functions from the library. These functions accept two iterators representing the beginning and end of the container. They return an iterator pointing to the element with the maximum or minimum value, respectively.

<code class="cpp">#include <algorithm>
#include <vector>

int main() {
  // Create a vector
  std::vector<int> vector = {1, 3, 5, 2, 4};

  // Find the maximum value
  std::vector<int>::iterator max_it = std::max_element(vector.begin(), vector.end());

  // Print the maximum value
  std::cout << "Maximum value: " << *max_it << std::endl;

  return 0;
}

Arrays:

For arrays, you can directly use the loop approach:

<code class="cpp">int array[] = {1, 3, 5, 2, 4};
int max_value = array[0];
for (int i = 1; i < sizeof(array) / sizeof(array[0]); i++) {
  if (array[i] > max_value) {
    max_value = array[i];
  }
}</code>

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