ZOJ_1241

#include <cstdlib> #include <iostream> #include <cmath> #include <iomanip> using namespace std; inline void cal(int a, int b, int c, char ch) { float result = 0.0; if(c == -1) result = sqrt(a * a + b * b); else result = sqrt(c * c - b * b); if(c == -1) c = result; else (a == -1) ? a = result : b = result; if(a + b < c) cout << "Impossible." << endl; else cout << ch << " = " << setprecision(3) << fixed << result << endl; cout << endl; } int main(int argc, char *argv[]) { //freopen("input.txt", "rt", stdin); //freopen("output.txt", "wt", stdout); int a, b, c; int index = 1; while(cin >> a >> b >> c &&( a != 0 && b != 0 && c != 0)) { cout << "Triangle #" << index++ << endl; if(a == -1) cal(a, b, c, 'a'); else if(b == -1) cal(b, a, c, 'b'); else cal(a, b, c, 'c'); } return EXIT_SUCCESS; }