Demonstration of using using differing templates of a template parameter

test.cpp

#include <functional>
#include <algorithm>
#include <cstdio>

template<template<typename> class Op >
void Test(int &ia, int &ib, float &fa, float &fb, bool first){
	if(first){
		Op<int> op;
		ia = op(ia, ib);
	}
	else{
		Op<float> op;
		fa = op(fa, fb);
	}
}

int main(){
	int ia = 1, ib = 2;
	float fa = 5.0f, fb = 9.0f;

	printf(">          %i, %i, %f, %f\n", ia, ib, fa, fb);
	puts(  "Expected>  1, 2, 5.0, 9.0");

	Test<std::plus>(ia, ib, fa, fb, true);
	Test<std::plus>(ia, ib, fa, fb, false);

	printf("Plus>      %i, %i, %f, %f\n", ia, ib, fa, fb);
	puts(  "Expected>  3, 2, 14.0, 9.0");

	Test<std::multiplies>(ia, ib, fa, fb, true);
	Test<std::multiplies>(ia, ib, fa, fb, false);

	printf("Multiply>  %i, %i, %f, %f\n", ia, ib, fa, fb);
	puts(  "Expected>  6, 2, 126.0, 9.0");

	Test<std::minus>(ia, ib, fa, fb, true);
	Test<std::minus>(ia, ib, fa, fb, false);

	printf("Subtract>  %i, %i, %f, %f\n", ia, ib, fa, fb);
	puts(  "Expected>  4, 2, 117.0, 9.0");

}