aoj-0004-Simultaneous_Equation-1.cpp

gistfile1.cpp

#include <iostream>
#include <iomanip>
#include <vector>

using namespace std;


void ve_calc(double* ary, double* ans) {
	int i, j, tmp;


	for(i = 0; i < 2; i++) {
		*(ans + i) = (ary[2 - 2 * i] * ary[4 + i] - ary[1 + i] * ary[5 - 2 * i]) / (ary[0] * ary[4] - ary[1] * ary[3]) + 0;
	}
	// dbg: ok
}

int main() {
	int i, j;
	double tmp;
	double *ary = new double[6];
	vector<double> vect;

	i = j = 0;

/* input */
	for(i = 0; cin >> tmp; i++){
		vect.push_back(tmp);
	}
	// dbg: ok
	tmp = i / 6;
	// dbg: ok

	double *ans = new double[(int)tmp * 2];
	// ok
/* substitue vect for array */
	for(i = 0; i < tmp; i++) {
		for(j = 0; j < 6; j++) {
			ary[j] = vect.at(i * 6 + j);
		}
		// ok
/* call the "ve_calc()" */
		ve_calc(ary, ans + i * 2);

	}
	// dbg: ok

	for(i = 0; i < tmp * 2; i += 2) {
		cout << setprecision(4) << showpoint << ans[i] << " " << ans[i + 1] << endl;
	}

	///////////////////////////////////////////////////////
	// Oh... My coding skil is too low...?
	// I must learn more hard!
	// ...Are there sentences is sure??
	// <<MO DO NI DE MO NA RE!!>>
	///////////////////////////////////////////////////////
 
	delete[] ary;
	delete[] ans;

	return 0;
}