#include "..\CookHeader.h"

Array <int> px = { 7, -4, 0, 5 };  //  = 7x^3 -4x^2 +0x^1 +5x^0

string printPoly(Array <int> p_x) {
	int term = len(p_x) - 1; // ְ  = 迭 - 1
	string polyStr = "P(x) = ";

	for (int i = 0; i < len(p_x); i++) {
		int coef = p_x[i];  // 

		if (coef >= 0)
			polyStr += "+";
		polyStr += to_string(coef) + "x^" + to_string(term) + " ";
		term--;
	}

	return polyStr;
}

int calcPoly(int xVal, Array <int> p_x) {
	int retValue = 0;
	int term = len(p_x) - 1; // ְ  = 迭 - 1

	for (int i = 0; i < len(p_x); i++) {
		int coef = p_x[i]; // 
		retValue += coef * (int)pow(xVal, term);
		term--;
	}

	return retValue;
}

int main() {
	string pStr = printPoly(px);
	println(pStr);

	int xValue;
	input(xValue, "X-->");

	int pxValue = calcPoly(xValue, px);
	println(pxValue);
}