assert.cpp
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	#include <cassert>
	#include <cmath>
	#include <iostream>

	int main(int argc, char *argv[]) {
	double a;

	std::cout << "Enter a non-negative number\n";
	std::cin >> a;
	assert(a >= 0.0);
	std::cout << "The square root of " << a;
	std::cout << " is " << sqrt(a) << "\n";

	return 0;
	}