c2

1sem/programming basics/6/2_100.cpp

@@ -1,44 +0,0 @@
-// pb_6_2_100.cpp
-// Горбацевич Андрей
-#include <iostream>
-#include <cmath>
-using namespace std;
-
-double arctg(double, double);
-double mant(double);
-
-int main() {
-    double x, d;
-    cout << "x, d >>>";
-    cin >> x >> d;
-    if ((x < -1) or (x > 1)) {
-        cout << "err: x not in range";
-        return 0;
-    }
-
-    double oarctg = arctg(x, d);
-    double carctg = atan(x);
-    cout << "  own arctg(x) = " << oarctg << endl;
-    cout << "cmath arctg(x) = " << carctg << endl;
-    cout << "          diff = " << oarctg - carctg << endl;
-}
-
-double arctg(double x, double delta) {
-    double out = x;
-    double px = x;
-    int den = 1;
-    bool neg = false;
-    double pout = out + 0.1f;
-    while (abs(mant(out)-mant(pout)) > delta) {
-        pout = out;
-        neg = !neg;
-        x *= px*px;
-        den += 2;
-        out += x/den * (neg? -1 : 1);
-    }
-    return out;
-}
-
-double mant(double num) {
-    return num - (int)num;
-}