A compilation error occurred while trying to build my code. The error message states that the file "exprtk.hpp" cannot be found. I checked again and confirmed that the file exists in the specified location.
#include <iostream>
#include <cmath>
#include "exprtk.hpp"
#include "polar_area.h"
using namespace std;
double calculateArea(const exprtk::expression<double>& polarCurve, double theta1, double theta2) {
double area = 0.0;
double deltaTheta = 0.001;
for (double theta = theta1; theta <= theta2; theta += deltaTheta) {
polarCurve.value();
double r = polarCurve.value();
double nextR = polarCurve.value(theta + deltaTheta);
double sectorArea = 0.5 * (r * r + nextR * nextR) * deltaTheta;
area += sectorArea;
}
return area;
}
int main() {
string expression;
cout << "Enter the polar curve function (use variable 'theta'): ";
getline(cin, expression);
exprtk::symbol_table<double> symbolTable;
symbolTable.add_variable("theta", 0.0);
symbolTable.add_constants();
exprtk::expression<double> polarCurve;
polarCurve.register_symbol_table(symbolTable);
exprtk::parser<double> parser;
parser.compile(expression, polarCurve);
double theta1, theta2;
cout << "Enter the starting angle (in radians): ";
cin >> theta1;
cout << "Enter the ending angle (in radians): ";
cin >> theta2;
double area = calculateArea(polarCurve, theta1, theta2);
cout << "Area between the angles: " << area << endl;
return 0;
}
The error is in the image below
I expected the code to compile successfully without any errors
