#include<iostream.h>
#include<stdlib.h>  //za da raboti exit(0)

float suma(float a, float b){
  return a+b;
}

float razlika(float a, float b){
  return a-b;
}

float proizv(float a, float b){
  return a*b;
}

void delenie(float a, float b){
  if (b==0) cout<<"na 0 ne se deli";
  else cout<<a/b;
  cout<<endl;
}

float stepen(float a, float b){
  int i;
  float st;
  st=1;
  for(i=1; i<=b; i++) {
   st=st*a;
  }
  return st;
}

int main(){
float x,y;
int choice;

 while(true){
 cout<<"vavedi 2 chisla: ";
 cin>>x>>y;
 cout<<"Izberete dejstvie:"<<endl;
 cout<<"1.Subirane"<<endl;
 cout<<"2.Izvajdane"<<endl;
 cout<<"3.Umnojenie"<<endl;
 cout<<"4.Delenie"<<endl;
 cout<<"5.Stepenuvane"<<endl;
 cout<<"6.Izhod"<<endl;
 cin>>choice;
 switch (choice) {
  case 1: cout<<suma(x,y)<<endl; break;
  case 2: cout<<razlika(x,y)<<endl; break;
  case 3: cout<<proizv(x,y)<<endl; break;
  case 4: delenie(x,y); break;
  case 5: cout<<stepen(x,y)<<endl; break;
  case 6: exit(0);
  default: continue;
 }
 }

    return 0;
}