#include <stdio.h>
int value(int);
#define a 3.592
#define b 0.0427
#define R 0.08206
int n;
int T;
int v;
float p;
void realgas (float n, float T);
void display1 (float V);
void display2 (float P);
void error ();
int main()
{
	float n,T,ini_vol,fin_vol;

	do {
	printf("Mole :	");
	scanf("%f",&n);
	} while( n <= 0);

	printf("\n");

	do {
	printf("Temperature (Kelvin):	");
	scanf("%f",&T);
	}while(T<=0);
	printf("\n");

	do {
	printf("Initial Volume (milliliter):	");
	scanf("%f",&ini_vol);
	}while(ini_vol<=0);
	printf("\n");

	do{
	printf("Final Volume():	");
	scanf("%f",&fin_vol);
	}while(fin_vol<=0);
	printf("\n");

	{
		printf("Increment:	");
		scanf("%d");
	}

	{
		printf("\n%0.4f moles of carbon dioxide at %.0f Kelvin\n",n,T);
	}

	{
		printf("\nVolume (milliliter)\tPressure(atm)");
	}

	{
		int i;
		float p; //= 0;
		int volume;
		for(i = 400; i <=600 ; i += 50){
			volume = i/1000;
			p =	((n * R * T) / (volume - (n * b))) - (((n*n) * a) / (volume*volume));
			printf("\n%d\t\t\t%f\n", i, p);
		}
		{
			printf("\n\nDo you want to continue (Y-Yes,N-No):Y\n");
		}
		{
			printf("-----------------------------------------------------\n");
		}
	do {
	printf("Mole :	");
	scanf("%f",&n);
	} while( n <= 0);

	printf("\n");

	do {
	printf("Temperature (Kelvin):	");
	scanf("%f",&T);
	}while(T<=0);
	printf("\n");

	do {
	printf("Initial Volume (milliliter):	");
	scanf("%f",&ini_vol);
	}while(ini_vol<=0);
	printf("\n");

	do{
	printf("Final Volume():	");
	scanf("%f",&fin_vol);
	}while(fin_vol<=0);
	printf("\n");

	{
		printf("Decrement:	");
		scanf("%d");
	}

	{
		printf("\n%0.4f moles of carbon dioxide at %.0f Kelvin\n",n,T);
	}

	{
		printf("\nVolume (milliliter)\tPressure(atm)");
	}

	{
		for(i = 600; i >= 400; i -= 50){
			volume = i/1000;
			p =	((n * R * T) / (volume - (n * b))) - (((n*n) * a) / (volume*volume));
			printf("\n%d\t\t\t%f\n", i, p);
		}
		{
			printf("\n\nDo you want to continue (Y-Yes,N-No):N\n");
		}
		{
			printf("-----------------------------------------------------\n");
		}
		{
			printf("From this calculation, you know that when volume (ml) in increasing,\npressure of gas reduce\n\nThank you. ");
		}
	}

	return 0;}

}