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- #include <iostream>
- #include <iomanip>
- using namespace std;
- class Krug {
- const double PI = 3.14;
- double radius;
- public:
- Krug() {}
- Krug(const float rad) {
- radius = rad;
- }
- double perimetar() {
- return 2 * PI * radius;
- }
- double plostina() {
- return PI * radius * radius;
- }
- float ednakvi() {
- return perimetar() == plostina();
- }
- };
- int main() {
- float r;
- cin >> r;
- //instanciraj objekt od klasata Krug cij radius e vrednosta procitana od tastatura
- Krug k(r);
- cout << k.perimetar() << endl;
- cout << k.plostina() << endl;
- cout << k.ednakvi() <<endl;
- //instanciraj objekt od klasata Krug cij radius ne e definiran
- Krug k1;
- return 0;
- }
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