Code:
#include <iostream>
#include <string>
#include <iomanip>
//Prototypes
int ReadDials (char &d1, char &d2, char &d3, char &d4, char &d5, char &d6, char &d7, char &d8);
int ToDigit (char &d);
void AcknowledgeCall(char d1, char d2, char d3, char d4, char d5, char d6, char d7, char d8);
char d = 0;
using namespace std;
int main()
{
char d1, d2, d3, d4, d5, d6, d7, d8;
int ReturnValue = 0;
while (ReturnValue != -5)
{
ReturnValue = ReadDials(d1,d2,d3,d4,d5,d6,d7,d8);
switch(ReturnValue)
{
case -1: cout <<"ERROR- An invalid character was entered." << endl; break;
case -2: cout <<"ERROR- Phone number can't begin with 0." << endl; break;
case -3: cout <<"ERROR- Phone number can't begin with 555." << endl; break;
case -4: cout <<"ERROR- Hyphen is not in the correct posistion." << endl; break;
default: AcknowledgeCall(d1,d2,d3,d4,d5,d6,d7,d8);
}
}
return 0;
}
int ReadDials (char & d1, char & d2, char & d3, char & d4, char & d5, char & d6, char & d7, char & d8)
{
cout << "Enter a phone number: ";
cin >> d1;
if (d1 == 'Q' || d1 == 'q')
return -5;
cin >> d2 >> d3 >> d4 >> d5 >> d6 >> d7 >> d8;
int result = ToDigit(d);
ToDigit(d);
if (d == 0)
return -2;
if (d1 == 5 && d2 == 5 && d3 == 5)
return -3;
if (d4 != '-')
return -4;
if (result == -1)
return -1;
else
return 0;
}
int ToDigit (char & d)
{
toupper(d);
switch(d)
{
case 'A': case 'B': case 'C':
d = '2'; return 0; break;
case 'D': case 'E': case'F':
d = '3'; return 0; break;
case 'G': case 'H': case 'I':
d = '4'; return 0; break;
case 'J': case 'K': case 'L':
d = '5'; return 0; break;
case 'M': case 'N': case 'O':
d = '6'; return 0; break;
case 'P': case 'Q': case 'R': case 'S':
d = '7'; return 0; break;
case 'T': case 'U': case 'V':
d = '8'; return 0; break;
case 'W': case 'X': case 'Y': case 'Z':
d = '9'; return 0; break;
}
}
void AcknoweldgeCall(char d1, char d2, char d3, char d4, char d5, char d6, char d7, char d8)
{
cout << "Phone Number Dialed: " << d1 << d2 << d3 << d4 << d5 << d6 << d7 << d8;
}