'commit'

TangDou/AcWing/BinarySearch/790_1.cpp

@@ -0,0 +1,19 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+const double eps = 1e-8;
+int main() {
+    double x;
+    cin >> x;
+
+    double l = -10000, r = 10000;
+    while (r - l > eps) {
+        double mid = (l + r) / 2; // 注意：浮点数这里不能用右移1位！！
+        if (mid * mid * mid > x)
+            r = mid; // mid>x后面没有"="
+        else
+            l = mid;
+    }
+    printf("%.6lf\n", l);
+    return 0;
+}