Submission #1000617

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <cmath>
using namespace std;

int main() {
    double x[3], y[3];
    for (int i = 0; i < 3; i++) {
        scanf("%lf %lf", &x[i], &y[i]);
    }
    double S[3], ang[3];
    for (int i = 0; i < 3; i++) {
        S[i] = hypot(x[(i + 1) % 3] - x[(i + 2) % 3], y[(i + 1) % 3] - y[(i + 2) % 3]);
        double vx = (x[(i + 1) % 3] - x[i]), vy = (y[(i + 1) % 3] - y[i]);
        double ux = (x[(i + 2) % 3] - x[i]), uy = (y[(i + 2) % 3] - y[i]);
        ang[i] = fabs(atan2(vx * uy - ux * vy, vx * ux + vy * uy));
    }
    double ans = 0;
    for (int i = 0; i < 3; i++) {
        ans = max(ans, S[i] / (2 + 1.0 / atan(ang[(i + 1) % 3] / 2) + 1.0 / atan(ang[(i + 2) % 3] / 2)));
    }
    printf("%.10lf\n", ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:9:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lf %lf", &x[i], &y[i]);
                                       ^

Judge Result