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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_functional_minuss.htm below:

C++ Functional Minus Operator

It is a subtraction function object class and binary function object class whose call returns the result of subtracting its second argument from its first argument (as returned by the binary operator -).

Following is the declaration for std::minus.

template <class T> struct minus;

template <class T> struct minus;

T − It is a type of the arguments and return type of the functional call.

none

noexcep − It doesn't throw any exceptions.

In below example explains about std::minus.

#include <iostream>
#include <functional>
#include <algorithm>

int main () {
   int numbers[]={10000,3000,35000};
   int result;
   result = std::accumulate (numbers, numbers+3, 100, std::minus<int>());
   std::cout << "The result is " << result << ".\n";
   return 0;
}

Let us compile and run the above program, this will produce the following result −

The result is -47900.

functional.htm

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