This is a simple game I'm writing to test the idea of using games to teach C++. https://learncodethehardway.com/
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#include <iostream>
#include <algorithm>
#include <vector>
#include <stdexcept>
using namespace std;
class ExpectFail {
public:
string message;
ExpectFail(string m) : message(m) {};
};
void expect(bool test, string msg) {
if(!test) {
throw ExpectFail("Expectation failed.");
}
}
int area(int length, int width) {
expect(length > 0 && width > 0, "Bad area given.");
return length * width;
}
int main() {
vector<int> numbers;
try {
numbers.push_back(100);
numbers.push_back(-100);
cout << "Area " << area(numbers.at(1), 100) << "\n";
return 0;
} catch(out_of_range &e) {
cout << "Out of range ERROR: " << e.what() << "\n";
return 2;
} catch(...) {
cout << "Exception: something went wrong\n";
return 3;
}
}