#include <iostream>
using namespace std;
int main()
{
int k;
float x;
float c,d,e,f;
cout << "x= ";
cin >> x;
cout << "k= ";
cin >> k;
switch (k)
{
case 3:
case 6:
case 11:
c=2*x+5;
cout <<2<<"*"<<x<<"+"<<5<<"="<<c<<endl;
break;
case 9:
case 10:
d=10-x;
cout <<10<<"-"<<x<<"="<<d<<endl;
break;
case 13:
e=3*x;
cout <<3<<"*"<<x<<"="<<e<<endl;
break;
default :
f=12*x;
cout <<12<<"*"<<x<<"="<<f<<endl;
break;
}
cin.get();
return 0;
}
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