#include<iostream.h>     
#include<conio.c>  
 
char choice;
int time1;
int time2;
char cnt;
int result;
//**********************************************************
int Power(int time1, int time2)
{
    int exponentResult=1;
    for(int i=0 ; i<time2 ; i++)
        exponentResult=time1 * exponentResult;
    return exponentResult;
}
//***************************************************************
void Factorial(int time1, int* factorialResult)
{
    *factorialResult=1;
    for(int i=time1 ; i>0 ; i--)
        *factorialResult=*factorialResult * i;
}
/******************************************************************/
                       int sum (int time1, int time2)
{
int sum;
sum = time1 + time2;
return sum;
}
/******************************************************************/
                     int multiply(int time1, int time2)
{
 int multy;
multy = time1 * time2;
return multy;
}
/****************************************************/
int main()
{ 
do
{
    cout<<"\n Enter first number: ";
    cin>>time1;    
    cout<<"\n Enter second number: ";
    cin>>time2;   
    cout<<"\n\tEnter S for Sum\n";      
    cout<<"\tEnter V to find power\n";          
    cout<<"\tEnter A to Multiply\n"; 
    cout<<"\tEnter F for the factorials\n";     
    cout<<"\tEnter Q to Quit\n";  
    cout<<"\n\tPlease enter the option: ";
    cin>>choice;        
switch (choice)
{
    case 's':
    cout<<" Result after addition is : "<<sum(time1, time2)<<endl;
    break;
    case 'a':
    cout<<" Result of Multiply first & second : "<<multiply(time1, time2)<<endl;
    break;
    case 'v':   
    cout<<" Result of power integers is : "<<Power(time1,time2)<<endl;
    break;
    case 'f':
    Factorial(time1,&result);
    cout<<endl<<"The result of factorail of first number is :     "<<result;
    Factorial(time2,&result);
    cout<<endl<<"The result of factorail of Second number is :     "<<result;
    break;
    case 'q':
    exit(0); 
    break;
  if(choice == 's' || choice == 'v' || choice == 'a' || choice == 'f' || choice == 'q') 
 
    default:    
    cout<<"\nwrong choice entered\n";
    break;
   }
    cout<<"\nDo you want to continue? Y: ";
    cin>>cnt;
    }
while(cnt == 'y');
clrscr();
getch();
}