Исправление ошибок

#include <iostream.h>
#include <stdlib.h>
#include <fstream.h>
int vvod();
int vivod();
char Name[10];
struct ved
{ int tn;
char fam[10];
float nach;
float vich;
float dolg;
float vidach;
} worker;
ved s[3];
 
int i;
int main()
{int answer,k=1;
do
{cout<<"1-vvod"<<endl;
 cout<<"2-saldo"<<endl;
 cout<<"3-vivod"<<endl; 
 cout<<"4-vihod"<<endl;
 cin>>answer;
 switch(answer){
 case 1 : vvod();break;
 case 2 : vivod();break;
 case 3 : return 0;break;
 default: main();
}
}
while(k==1);
}
 
//==============================================
void vvod()
{ofstream out_file("OUTFILE.DAT");
if(!out_file)
{cout<<"ERROR!!!";
exit(1);
}
int c;
do
for (int i=0;i<3;i++){ 
cout<<"tabelniy nomer"<<endl;
cin>>worker.tn;
cout<<"familia"<<endl;
cin>>worker.fam;
cout<<"Nachisleno"<<endl;
cin>>worker.nach;
cout<<"Vichteno"<<endl;
cin>>worker.vich;
/*cout<<"Prodolzhit?(yes-0!no-1)";
cin>>c;
}
while (c!=0);
cout <endl<<endl<<endl;
out_file.close();
}*/
//===============================
 
void saldo()
{
for (int i=0;i<3;i++)
{if(((worker[i].nach)-(worker[i].vich))<0)
 worker[i].dolg=((worker[i].vich)-(worker[i].nach)) && worker[i].vidach=0;
 else worker[i].vidach=((worker[i].nach)-(worker[i].vich)) && worker[i].dolg=0;
}
float alldolg=(worker[0].dolg)+(worker[1].dolg)+(worker[2].dolg);
float allvidach=(worker[0].vidach)+(worker[1].vidach)+(worker[2].vidach);
 
}
//===============================
/*void all()
{
float alldolg=(worker[0].dolg)+(worker[1].dolg)+(worker[2].dolg);
float allvidach=(worker[i].vidach)+(worker[i].vidach)+(worker[i].vidach);
 
}*/
//===============================
void vivod()
{
    ifstream in_file("OUTFILE.DAT");
    cout<<"spisok sotr";
    cout<<"-------------";
for (int i=0;i<3;i++)
{
    while (!in_file.eof())
{in_file>>worker[i].fam>>worker[i].nach>>worker[i].vich>>worker[i].dolg>>worker[i].vidach;
 
cout<<worker[i].fam<<endl;
cout<<worker[i].nach<<endl;
cout<<worker[i].vich<<endl;
cout<<worker[i].dolg<<endl;
cout<<worker[i].vidach<<endl;   }
}
    while (!in_file.eof())
    {in_file>>"Vsego dolg/vidaca"alldolg>>"/">>allvidach;
    cout<<"Vsego dolg/vidaca"alldolg<<"/"<<allvidach<<endl;}
in_file.close();
cout<<endl<<endl<<endl;
return 0;
}