Question

I have a sorted array of double values in C++. Is there an STL function that will return the index of the nearest value in the array to a given double value?

For example, given the following array

double myarray[5] = { 1.0, 1.2, 1.4. 1.5, 1.9 }; 

the function call

search(myarray, 1.6); 

should return 3, the index of the element nearest to 1.6, instead of -1 (or some other flag value) indicating that the value 1.6 wasn’t found.

Answer 1

maybe std::lower_bound std::upper_bound will help you.