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1sem/adaptation courses/3/10.cpp

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+// ac_3_10.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+bool in_D(double x, double y)
+{
+    double R = x*x + y*y;
+    bool up = (y >= 0);
+    bool l = (x <= 0);
+    bool r = (x >= 0);
+    bool fp = l and (R <= 1);
+    bool sp = r and (R >= 0.36) and (R <= 1);
+    return up and (fp or sp);
+}
+
+int main()
+{
+    double x, y;
+    cout << "x, y >>>";
+    cin >> x >> y;
+    double P = (in_D(x, y)? x+y : 0 );
+    cout << "P(x,y)= " << P << endl;
+}

1sem/adaptation courses/3/11.cpp

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+// ac_3_11.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+bool in_D(double x, double y)
+{
+    bool moreTwo = (y >= 2);
+    bool inAbs = (y >= 2*abs(x));
+    return moreTwo or inAbs;
+}
+
+int main()
+{
+    double x, y, a;
+    cout << "x, y, a >>>";
+    cin >> x >> y >> a;
+    double S = ((in_D(x, y) and (a < 2))? (pow(a, -x)) : log(1 + x*x));
+    cout << "S(x,y,a)= " << S << endl;
+}

1sem/adaptation courses/3/9.cpp

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+// ac_3_9.cpp
+// Горбацевич Андрей
+#include <iostream>
+#include <clocale>
+#include <cmath>
+using namespace std;
+
+bool in_D(double x, double y)
+{
+    return ((y >= abs(x)) && (x*x+y*y <= 1));
+}
+
+int main()
+{
+    double x, y;
+    cout << "x, y >>>";
+    cin >> x >> y;
+    double z = (in_D(x, y)? sin(x) : x + 2 * y );
+    cout << "z(x,y)= " << z << endl;
+}