Pointers, Dynamic Arrays and Exception Handler. HELP!!!

[Robbert Williams]

I have this activity for programming class. I'm only allowed to place codes where it says "add code here". I managed to get some voids to work but i keep having compile error showing "too many arguments to function 'void MilesPerrGallon(double, double)'". Can anyone tell whats going on? Tnx :D

========================================================================

include<iostream></iostream>

include<iomanip></iomanip>

using namespace std;

const int size=10;// use in menu[1] miles per gallon
typedef double pointers;
void MilesPerrGallon(double ptr1,double ptr2);//process and display milespergallon
void MperG();//input miles and gallons and call function MilePerGallon
void getSort();//use dynamic array and a sort techniques to sort n values
void displaySort(int ptr,int smax);//displaying the vsorted values in descending order
char displayMenu(char *pt);//display the option on screen and return values 1,2 or 3
//using a pointer variable

int main()
{
char ans,sagot;
char *ptr;

//add code here
do{
ptr=&sagot;
do
{
ans=displayMenu(ptr);
}while(ptr!='1'&&ptr!='2'&&*ptr!='3');

switch(sagot)
{
//add code here
        case '1':  
            {
                MperG();
            }
        break;
    case '2':  
            {

            }
        break;
    case '3':
            {
                cout<<"goodbye for now....\n";
                system("pause");
                exit(1);
            }
                exit(1);
        break;
}


do
{
    cout<<"Try Again?[y/n]:";
    cin>>*ptr;
    *ptr=tolower(*ptr);
}while(*ptr!='y'&&*ptr!='n');
}while(*ptr=='y');
cout<<endl;
cout<<"Thank you for using my program!";
system("pause>0");
return 0;

}

/////////////////////////
void MperG()
{double miles[size],gallons[size];
int ctr;
pointers milPtr,galPtr;
int msize;

system("cls");
cout<<"COMPUTING FOR MPG : miles per gallon...\n";

cout<<"MILES\n";
//add code here
while(true)
{
cout<<"Size must be from 5 to 15 only.\n\n";
cout<<"Specify the size of the array: ";
cin>>msize;
try
    {
        if(msize>15||msize<3)
         throw msize;
         break;
    }
catch(int x)
    {
        cout<<"\nSIZE MUST BE FROM 5 TO 15 ONLY!";
        system("pause>0");
        system("cls");
        continue;
    }
}

milPtr=new double[msize];
galPtr=new double[msize];
cout<<"\n\n\nMiles\n";
for(ctr=0;ctr<msize;ctr++)
{
    bool ans=true;
    while(ans)
    {
        cout<<"The number must be from 100-250 only.\n\n";
        cout<<"Miles ("<<ctr<<"): ";
        cin>>*(milPtr+ctr);

    try
        {
            if(*(milPtr+ctr)>250||*(milPtr+ctr)<100)
             throw *(milPtr+ctr);
             break;
        }
    catch(double e)
        {
            cout<<e<<" IS INVALID. THE NUMBER MUST BE FROM 100-250 ONLY!";
            system("pause>0");
            system("cls");
            continue;
        }
    }
}

/*********/
cout<<"GALLONS\n";
//add code here
cout<<"The number must be from 5-25 only.\n\n";

for(ctr=0;ctr<msize;ctr++)
{
    bool ans=true;
    while(ans)
    {
        cout<<"Gallons ("<<ctr<<"): ";
        cin>>*(galPtr+ctr);

    try
        {
            if((*galPtr+ctr)>25||*(galPtr+ctr)<5)
             throw *(galPtr+ctr);
             break;

        }
    catch(double e)
        {
            cout<<e<<" IS INVALID. THE NUMBER MUST BE FROM 5-25 ONLY!";
            system("pause>0");
            system("cls");
            continue;
        }
    }
}

//call MilePerrGallon here
MilesPerrGallon(milPtr,galPtr,msize);

}
////////////////////////
void MilesPerrGallon(double ptr1,double ptr2)
{

double mpg[size];
pointers mpgPtr;
 int index;
//add code here
mpgPtr=&mpg[0];
for(index=0;index<size;index++)
    *(mpgPtr+index)=*(ptr1+index)/ *(ptr2+index);
cout<<"MILES     /        GALLON     =   MPG\n";
cout<<fixed<<setprecision(2); 
for(index=0;index<size;index++)
    {
        cout<<*(ptr1+index)
            <<setw(5)<<"/"
            <<setw(12)<<*(ptr2+index)
            <<setw(16)<<*(mpgPtr+index)
            <<endl;
    }

}
///////////////////////////////////////
void getSort()
{
//add code here
//call displaysort here
void displaySort(int *ptr,int smax);

}

/////////////////////////
void displaySort(int *ptr,int smax)
{
//add code here
}
////////////////////////////////////////////

//////////////////////////////////////////
char displayMenu(char pt)
{
//add code here
cout<<"MAIN MENU"<<endl
<<"[1] - MPG (Miles Per Gallon)"<<endl
<<"[2] - Sorting of Numbers"<<endl
<<"[3] - Exit Program"<<endl
<<"Enter Option: ";
cin>>pt;
return *pt;
}