Won't compile straight from text!
Hi guys!
Here's one that won't compile out of the box (student file from the text). Can anyone tell me why I'm getting:
Data Structs error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup
Code:
#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
class Personal {
public:
Personal();
Personal(char*,char*,char*,int,long);
void writeToFile(fstream&) const;
void readFromFile(fstream&);
void readKey();
int size() const {
return 9 + nameLen + cityLen + sizeof(year) + sizeof(salary);
}
bool operator==(const Personal& pr) const {
return strcmp(pr.SSN,SSN) == 0;
}
protected:
const int nameLen, cityLen;
char SSN[10], *name, *city;
int year;
long salary;
ostream& writeLegibly(ostream&);
friend ostream& operator<<(ostream& out, Personal& pr) {
return pr.writeLegibly(out);
}
istream& readFromConsole(istream&);
friend istream& operator>>(istream& in, Personal& pr) {
return pr.readFromConsole(in);
}
};
Personal::Personal() : nameLen(10), cityLen(10) {
name = new char[nameLen+1];
city = new char[cityLen+1];
}
Personal::Personal(char ........n, char *n, char *c, int y, long s) :
nameLen(10), cityLen(10) {
name = new char[nameLen+1];
city = new char[cityLen+1];
strcpy(SSN,ssn);
strcpy(name,n);
strcpy(city,c);
year = y;
salary = s;
}
void Personal::writeToFile(fstream& out) const {
out.write(SSN,9);
out.write(name,nameLen);
out.write(city,cityLen);
out.write(reinterpret_cast<const char*>(&year),sizeof(int));
out.write(reinterpret_cast<const char*>(&salary),sizeof(int));
}
void Personal::readFromFile(fstream& in) {
in.read(SSN,9);
in.read(name,nameLen);
in.read(city,cityLen);
in.read(reinterpret_cast<char*>(&year),sizeof(int));
in.read(reinterpret_cast<char*>(&salary),sizeof(int));
}
void Personal::readKey() {
char s[80];
cout << "Enter SSN: ";
cin.getline(s,80);
strncpy(SSN,s,9);
}
ostream& Personal::writeLegibly(ostream& out) {
SSN[9] = name[nameLen] = city[cityLen] = '\0';
out << "SSN = " << SSN << ", name = " << name
<< ", city = " << city << ", year = " << year
<< ", salary = " << salary;
return out;
}
istream& Personal::readFromConsole(istream& in) {
char s[80];
cout << "SSN: ";
in.getline(s,80);
strncpy(SSN,s,9);
cout<<'['<<SSN<<']';
cout << "Name: ";
in.getline(s,80);
strncpy(name,s,nameLen);
cout<<'['<<name<<']';
cout << "City: ";
in.getline(s,80);
strncpy(city,s,cityLen);
cout<<'['<<city<<']';
cout << "Birthyear: ";
in >> year;
cout<<'['<<year<<']';
cout << "Salary: ";
in >> salary;
cout<<'['<<salary<<']';
cin.ignore();
return in;
}
