CODE EXAMPLE FOR CPP

lower_bound in C++

// CPP program to illustrate
// std :: lower_bound
#include <bits/stdc++.h>
 
// Driver code
int main()
{
    // Input vector
    std::vector<int> v{ 10, 20, 30, 30, 30, 40, 50 };
 
    // Print vector
    std::cout << "Vector contains :";
    for (unsigned int i = 0; i < v.size(); i++)
        std::cout << " " << v[i];
    std::cout << "
";
 
    std::vector<int>::iterator low1, low2, low3;
     
    // std :: lower_bound
    low1 = std::lower_bound(v.begin(), v.end(), 30);
    low2 = std::lower_bound(v.begin(), v.end(), 35);
    low3 = std::lower_bound(v.begin(), v.end(), 55);
 
    // Printing the lower bounds
    std::cout
        << "
lower_bound for element 30 at position : "
        << (low1 - v.begin());
    std::cout
        << "
lower_bound for element 35 at position : "
        << (low2 - v.begin());
    std::cout
        << "
lower_bound for element 55 at position : "
        << (low3 - v.begin());
 
    return 0;
}