Как преобразовать код C++ в C

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#include <stdio.h>
#include <conio.h>
#include <iostream>
#include <cmath>
#include<string.h>
#include <stdlib.h> 
#include<time.h>
#include <fstream> 
#include<list>
using namespace std;

#define NO_OF_ROWS	20

#define NO_OF_COLUMNS	6


main(void)
{
	unsigned int r,c,Class,DesiredSeat,n=1,Age,PR=0,SP=0,OfficeWork=0;

	unsigned int SeatsNo[NO_OF_ROWS][NO_OF_COLUMNS],FlagAge=0;

	char Sex;

	unsigned int SeatingPlan[NO_OF_ROWS][NO_OF_COLUMNS] = {{0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0},

													    {0, 0, 0, 0, 0, 0}

														 };

	

	cout<<"Seating Nos.\n";

	n=1;

	for(r=0;r<NO_OF_ROWS;r++)
	{
		cout<<"Row-"<<(r+1);

		for(c=0;c<NO_OF_COLUMNS;c++)
		{

			cout<<"\t"<<n;

			n=n+1;

		}

		if(r<=5) cout<<"\tFirst Class";

		if(r>=6) cout<<"\tEconomy Class";

		cout<<"\n";

	}
	
	while(1)

	{

	FlagAge=1;	

	cout<<"\n\n";

	cout<<"Seats Availability\n";

	for(r=0;r<NO_OF_ROWS;r++)
	{

		cout<<"Row-"<<(r+1);

		for(c=0;c<NO_OF_COLUMNS;c++)

		{

			if(SeatingPlan[r][c] == 1) cout<<"\tX";

			else					  cout<<"\t*"; 	

		}

		if(r<=5) cout<<"\tFirst Class";

		if(r>=6) cout<<"\tEconomy Class";

		cout<<"\n";

	}

	cout<<"\n\n Enter 0-> To EXIT..."; 

	cout<<"\n\n Enter 1-> First Class"; 

//	cout<<"\n  Enter 2-> Business Class"; 

	cout<<"\n Enter 3-> Economy Class\n"; 

	cout<<"\n\nEnter the Class: "; 	cin>>Class;

	if(Class == 0) exit(0);

	

	cout<<"\n Enter the Gender M/F: "; cin>>Sex;

	if(Sex == 'F' || Sex == 'f')
	{

		cout<<"\nEnter the Age = "; cin>>Age;	

		if(Age<35) FlagAge=0;

	}

	else 

	FlagAge=1;
	
	cout<<"\nIf the travel is for Official Work: Press 1 for YES and 0 for NO: "; cin>>OfficeWork;

	cout<<"\nIf the traveller has Permanant Resisdency Certificate? Press 1 for YES and 0 for NO: "; cin>>PR;

	cout<<"\nIf the traveller has Special Permission? Press 1 for YES and 0 for NO: "; cin>>SP;

	

	if(FlagAge && (OfficeWork || PR || SP))

	{

	

	if(Class==1) cout<<"\n\nDesired Seat (1 - 30) = "; 

	if(Class==3) cout<<"\n\nDesired Seat (31 - 120) = "; 

	cin>>DesiredSeat;

	

	while(Class==1 && DesiredSeat>30)

	{

		cout<<"\nInvalid Desired Seat";

		cout<<"\n\nDesired Seat (1 - 30) = "; 

		cin>>DesiredSeat;

	}

	
	while(Class==3 && (DesiredSeat < 31 || DesiredSeat>120))

	{

		cout<<"\nInvalid Desired Seat";

		cout<<"\n\nDesired Seat (31 - 120) = "; 

		cin>>DesiredSeat;

	}

	

	if(Class == 0) exit(0);

	

	r = DesiredSeat/NO_OF_COLUMNS;

	c = (DesiredSeat%NO_OF_COLUMNS)-1;

	

	if(SeatingPlan[r][c] == 0) 	SeatingPlan[r][c] = 1;

	else						cout<<"\n\nSeat No. "<<DesiredSeat<<" is not Available";

	}

	else

	{

		cout<<"\n\nTHE TRAVELLING IS NOT ALLOWED.\n\n";

	}
}
}

Что я уже пробовал:

Я пробовал его в программировании на Си, но не смог решить

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