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- #include <iostream>
- using namespace std;
- class Krug {
- private:
- float radius;
- const float pi=3.14;
- public:
- Krug (float r1=0){
- if(r1>=0){
- radius=r1;
- }
- }
- void setRadius(float r){
- radius=r;
- }
- float plostina(){
- float p;
- p=radius*radius*pi;
- return p;
- }
- float perimetar(){
- float p;
- p=2*radius*pi;
- return p;
- }
- int ednakvi(){
- float plo;
- float per;
- plo=radius*radius*pi;
- per=2*radius*pi;
- return (plo==per);
- }
- };
- 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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