number system.cpp

#include <stdio.h>
#include <math.h>
#include<string.h>
#include <conio.h>

long int Bin_to_Dec(long int); //1:BINARY TO DECIMAL
long int Bin_to_Oct(long int); //2:BINARY TO OCTAL
long int Bin_to_Hex(long int); //3:BINARY TO HEXA-DECIMAL
long int Dec_to_Bin(long int); //4:DECIMAL TO BINARY
long int Dec_to_Oct(long int); //5:DECIMAL TO OCTAL
long int Dec_to_Hex(long int); //6:DECIMAL TO HEXA-DECIMAL
long int Oct_to_Bin(long int); //7:OCTAL TO BINARY
long int Oct_to_Dec(long int); //8:OCTAL TO DECIMAL
long int Oct_to_Hex(long int); //9:OCTAL TO HEXA-DECIMAL
void Hex_to_Bin(char []); //10:HEXA-DECIMAL TO BINARY
void Hex_to_Dec(char []); //11:HEXA-DECIMAL TO DECIMAL
void Hex_to_Oct(char []); //12:HEXA-DECIMAL TO OCTAL

int main()
{
	int op,num=1,check;
	long int bin,oct,dec;
	char hex[100];
	int i,j,space;	//  FOR PATTERN
	
	printf("\t\tWELCOME TO NUMBER SYSTEM CONVERSION\n\n");
	
	while(num!=0)
	{
		printf("\t\t*******CHOOSE THE CONVERSION*******\n\n");
	
		printf("***BINARY***\n");
		printf("1: Binary to Decimal.\n2: Binary to Octal.\n3: Binary to Hexa-Decimal.\n");

		printf("\n***DECIMAL***\n");
		printf("4: Decimal to Binary.\n5: Decimal to Octal.\n6: Decimal to Hexa-Decimal.\n");

		printf("\n***OCTAL***\n");
		printf("7: Octal to Binary.\n8: Octal to Decimal.\n9: Octal to Hexa-Decimal.\n");

		printf("\n***HEXA-DECIMAL***\n");
		printf("10: Hexa-Decimal to Binary.\n11: Hexa-Decimal to Decimal.\n12: Hexa-Decimal to Octal.\n");
		
		printf("\nENTER YOUR CHOICE: ");
		scanf("%d",&op);
		
		switch(op)
		{
			case 1:
				printf("\n***BINARY TO DECIMAL***\n");
				D:
				printf("\nEnter the Number in Binary form (0s & 1s): ");
				scanf("%ld",&bin);
				// CHECKING INPUT IS IN BINARY FORM
				check=bin;
				
				while(check!=0)
				{
					num=check%10;
    				if(num>1)
    				{
    					printf("\n%d IS NOT BINARY NUMBER.\n",bin);
    					printf("***TRY AGAIN****\n");
    					goto D;
					}
					else
					check=check/10;
				}
				
				Bin_to_Dec(bin); break;
			
			case 2:
				printf("\n***BINARY TO OCTAL***\n");
				E:
				printf("\nEnter the Number in Binary form (0s & 1s): ");
				scanf("%ld",&bin);
				// CHECKING INPUT IS IN BINARY FORM
				check=bin;
				
				while(check!=0)
				{
					num=check%10;
    				if(num>1)
    				{
    					printf("\n%d IS NOT BINARY NUMBER.\n",bin);
    					printf("***TRY AGAIN****\n");
    					goto E;
					}
					else
					check=check/10;
				}
				
				Bin_to_Oct(bin); break;
			
			case 3:
				printf("\n***BINARY TO HEXA-DECIMAL***\n");
				F:
				printf("\nEnter the Number in Binary form (0s & 1s): ");
				scanf("%ld",&bin);
				// CHECKING INPUT IS IN BINARY FORM
				check=bin;
				
				while(check!=0)
				{
					num=check%10;
    				if(num>1)
    				{
    					printf("\n%d IS NOT BINARY NUMBER.\n",bin);
    					printf("***TRY AGAIN****\n");
    					goto F;
					}
					else
					check=check/10;
				}
				
				Bin_to_Hex(bin); break;
			
			case 4:
				printf("\n***DECIMAL TO BINARY***\n");
				printf("\nEnter the Number in Decimal form (0 to 9): ");
				scanf("%ld",&dec);
				Dec_to_Bin(dec); break;
			
			case 5:
				printf("\n***DECIMAL TO OCTAL***\n");
				printf("\nEnter the Number in Decimal form (0 to 9): ");
				scanf("%ld",&dec);
				Dec_to_Oct(dec); break;
			
			case 6:
				printf("\n***DECIMAL TO HEXA-DECIMAL***\n");
				printf("\nEnter the Number in Decimal form (0 to 9): ");
				scanf("%ld",&dec);
				Dec_to_Hex(dec); break;
			
			case 7:
				printf("\n***OCTAL TO BINARY***\n");
				A:
				printf("\nEnter the Number in Octal form (0 to 7): ");
				scanf("%ld",&oct);
				// CHECKING INPUT IS IN OCTAL FORM
				check=oct;
				
				while(check!=0)
				{
					num=check%10;
    				if(num>7)
    				{
    					printf("\n%d IS NOT OCTAL NUMBER.\n",num);
    					goto A;
					}
					else
					{
					check=check/10;
					i++;
					}
				}
				Oct_to_Bin(oct); break;
			
			case 8:
				printf("\n***OCTAL TO DECIMAL***\n");
				B:
				printf("\nEnter the Number in Octal form (0 to 7): ");
				scanf("%ld",&oct);
				// CHECKING INPUT IS IN OCTAL FORM
				check=oct;
				
				while(check!=0)
				{
					num=check%10;
    				if(num>7)
    				{
    					printf("\n%d IS NOT OCTAL NUMBER.\n",num);
    					goto B;
					}
					else
					{
					check=check/10;
					i++;
					}
				}
				Oct_to_Dec(oct); break;
			
			case 9:
				printf("\n***OCTAL TO HEXA-DECIMAL***\n");
				C:
				printf("\nEnter the Number in Octal form (0 to 7): ");
				scanf("%ld",&oct);
				// CHECKING INPUT IS IN OCTAL FORM
				check=oct;
				
				while(check!=0)
				{
					num=check%10;
    				if(num>7)
    				{
    					printf("\n%d IS NOT OCTAL NUMBER.\n",num);
    					goto C;
					}
					else
					{
					check=check/10;
					i++;
					}
				}
				Oct_to_Hex(oct); break;
			
			case 10:
				printf("\n***HEXA-DECIMAL TO BINARY***\n");
				X:
				printf("\nEnter the Number in Hexa-Decimal form: ");
				scanf("%s",&hex);
				//check
				for(i=strlen(hex)-1;i>=0;i--)
				{
					if(hex[i]>'f' && hex[i]<='z' || hex[i]>'F'&& hex[i]<='Z')
					{
						printf("\nYou have to Enter Hexa-Decimal Number.\n");
						printf("'%c' IS NOT Hexa-Decimal Number.\n",hex[i]);
						goto X;
					}
				}
				Hex_to_Bin(hex); break;
			
			case 11:
				printf("\n***HEXA-DECIMAL TO DECIMAL***\n");
				Y:
				printf("\nEnter the Number in Hexa-Decimal form: ");
				scanf("%s",&hex);
				//check
				for(i=strlen(hex)-1;i>=0;i--)
				{
					if(hex[i]>'f' && hex[i]<='z' || hex[i]>'F'&& hex[i]<='Z')
					{
						printf("\nYou have to Enter Hexa-Decimal Number.\n");
						printf("'%c' IS NOT Hexa-Decimal Number.\n",hex[i]);
						goto Y;
					}
				}
				Hex_to_Dec(hex); break;
			
			case 12:
				printf("\n***HEXA-DECIMAL TO OCTAL***\n");
				Z:
				printf("\nEnter the Number in Hexa-Decimal form: ");
				scanf("%s",&hex);
				//check
				for(i=strlen(hex)-1;i>=0;i--)
				{
					if(hex[i]>'f' && hex[i]<='z' || hex[i]>'F'&& hex[i]<='Z')
					{
						printf("\nYou have to Enter Hexa-Decimal Number.\n");
						printf("'%c' IS NOT Hexa-Decimal Number.\n",hex[i]);
						goto Z;
					}
				}
				Hex_to_Oct(hex); break;
			
			default:
				printf("\n***INVALID NUMBER***\n");
				break;											
		}
		printf("\n\nDO YOU WANT TO CONTINUE = (1/0) :\n");
		scanf("%d",&num);

	}
	
	space = 3+35;
		for( i=1;i<=3;i++)
		{
			for( j=1;j<=space;j++)
			{
				printf(" ");
			}
			space--;
			for( j=1;j<=2*i-1;j++)
			{
				printf("*");
			}
			printf("\n");
		}
		space = 37;
		for( i=1;i<=3;i++)
		{
			for( j=1;j<=space;j++)
			{
				printf(" ");
			}
			space++;
			for( j=1;j<=2*(3-i)-1;j++)
			{
				printf("*");
			}
			printf("\n");
		}
		
}

long int Bin_to_Dec(long int bin)
{
	int rem,sum=0,i=0;
	while(bin!=0)
	{
		rem=bin%10;
		bin=bin/10;
		sum=sum+rem*pow(2,i);
		i++;
	}
	
	printf("\nEquivalent Decimal Number : %d",sum);
}

long int Bin_to_Oct(long int bin)
{
	int i=0,rem,sum=0,remain[100],len=0;
	
	while(bin!=0)
	{
		rem=bin%10;
		bin=bin/10;
		sum=sum+rem*pow(2,i);
		i++;
	}
	i=0;
	while(sum!=0)
	{
		remain[i]=sum%8;
		sum=sum/8;
		i++;
		len++;
	}
	printf("\nEquivalent Octal Number : ");
	for(i=len-1;i>=0;i--)
	{
		printf("%d",remain[i]);
	}
}

long int Bin_to_Hex(long int bin)
{
	int rem,i=0,sum=0,remain[100],len=0;
	
	while(bin!=0)
	{
		rem=bin%10;
		bin=bin/10;
		sum=sum+rem*pow(2,i);
		i++;
	}
	i=0;
	while(sum!=0)
	{
		remain[i]=sum%16;
		sum=sum/16;
		i++;
		len++;
	}
	printf("\nEquivalent Hexa-Decimal Number : ");
	for(i=len-1;i>=0;i--)
	{
		switch(remain[i])
		{
			case 10:
				printf("A"); break;
			
			case 11:
				printf("B"); break;
				
			case 12:
				printf("C"); break;
				
			case 13:
				printf("D"); break;
				
			case 14:
				printf("E"); break;
				
			case 15:
				printf("F"); break;
				
			default:
				printf("%d",remain[i]);
		}
		
	}
}

long int Dec_to_Bin(long int dec)
{
	int rem[50],i,len=0;
	do
	{
		rem[i]=dec%2;
		dec=dec/2;
		i++;
		len++;
	}
	while(dec!=0);
	
	printf("\nEquivalent Binary Number : ");
	for(i=len-1;i>=0;i--)
	{
		printf("%d",rem[i]);
	}
}

long int Dec_to_Oct(long int dec)
{
	int rem[50],i,len=0;
	do
	{
		rem[i]=dec%8;
		dec=dec/8;
		i++;
		len++;
	}
	while(dec!=0);
	
	printf("\nEquivalent Octal Number : ");
	for(i=len-1;i>=0;i--)
	{
		printf("%d",rem[i]);
	}
}

long int Dec_to_Hex(long int dec)
{
	int rem[50],i,len=0;
	do
	{
		rem[i]=dec%16;
		dec=dec/16;
		i++;
		len++;
	}
	while(dec!=0);
	
	printf("\nEquivalent Hexa-Decimal Number : ");
	for(i=len-1;i>=0;i--)
	{
		switch(rem[i])
		{
			case 10:
				printf("A"); break;
			
			case 11:
				printf("B"); break;
				
			case 12:
				printf("C"); break;
				
			case 13:
				printf("D"); break;
				
			case 14:
				printf("E"); break;
				
			case 15:
				printf("F"); break;
				
			default:
				printf("%d",rem[i]);
		}
		
	}
}

long int Oct_to_Bin(long int oct)
{
	int rem[50],len=0,decimal=0,i=0,num,ans;
	
	while(oct!=0)
	{
		ans=oct % 10;
        decimal = decimal + ans * pow(8,i);
        i++;
        oct = oct/10;
	}
	
	i=0;
    do
	{
		rem[i]=decimal%2;
		decimal=decimal/2;
		i++;
		len++;
	}
	while(decimal!=0);
	
	printf("\nEquivalent Binary Number : ");
	for(i=len-1;i>=0;i--)
	{
		printf("%d",rem[i]);
	}
}

long int Oct_to_Dec(long int oct)
{
	int decimal=0,i=0,num,ans;
	
	while(oct!=0)
	{
		ans=oct % 10;
        decimal = decimal + ans * pow(8,i);
        i++;
        oct = oct/10;
	}
    printf("\nEquivalent Decimal Number : %d",decimal);
}

long int Oct_to_Hex(long int oct)
{
	int rem[50],len=0,decimal=0,i=0,num,ans=0;
	while(oct!=0)
	{
		ans=oct % 10;
        decimal = decimal + ans * pow(8,i);
        i++;
        oct = oct/10;
	}
	i=0;
	while(decimal!=0)
	{
		rem[i]=decimal%16;
		decimal=decimal/16;
		i++;
		len++;
	}
	printf("\nEquivalent Hexa-Decimal Number : ");
	for(i=len-1;i>=0;i--)
	{
		switch(rem[i])
		{
			case 10:
				printf("A"); break;
			
			case 11:
				printf("B"); break;
				
			case 12:
				printf("C"); break;
				
			case 13:
				printf("D"); break;
				
			case 14:
				printf("E"); break;
				
			case 15:
				printf("F"); break;
				
			default:
				printf("%d",rem[i]);
		}
		
	}
}

void Hex_to_Bin(char hex[])
{
	int i=0;
	printf("\nEquivalent Binary Number : ");
    for(i=0;i<strlen(hex);i++)
    {
        switch (hex[i])
        {
        case '0':
            printf("0000"); break;
        case '1':
            printf("0001"); break;
        case '2':
            printf("0010"); break;
        case '3':
            printf("0011"); break;
        case '4':
            printf("0100"); break;
        case '5':
            printf("0101"); break;
        case '6':
            printf("0110"); break;
        case '7':
            printf("0111"); break;
        case '8':
            printf("1000"); break;
        case '9':
            printf("1001"); break;
        case 'A':
        case 'a':	
            printf("1010"); break;
        case 'B':
        case 'b':
            printf("1011"); break;
        case 'C':
        case 'c':	
            printf("1100"); break;
        case 'D':
        case 'd':	
            printf("1101"); break;
        case 'E':
        case 'e':	
            printf("1110"); break;
        case 'F':
        case 'f':	
            printf("1111"); break;
        
        default:
            printf("\n Invalid hexa digit %c ", hex[i]);			
        }
    }

}

void Hex_to_Dec(char hex[])
{
	int i,num=0,power=0,decimal=0;
	
	for(i=strlen(hex)-1;i>=0;i--)
	{
		if(hex[i]=='A'||hex[i]=='a')
		{
			num=10;
		}
		else if(hex[i]=='B'||hex[i]=='b')
		{
			num=11;
		}
		else if(hex[i]=='C'||hex[i]=='c')
		{
			num=12;
		}
		else if(hex[i]=='D'||hex[i]=='d')
		{
			num=13;
		}
		else if(hex[i]=='E'||hex[i]=='e')
		{
			num=14;
		}
		else if(hex[i]=='F'||hex[i]=='f')
		{
			num=15;
		}
		else
		//(a[i]>=0 || a[i]<=9)
		{
			num=hex[i]-48;
		}
		
		decimal=decimal+num*pow(16,power);
		power++;
	}
	printf("\nEquivalent Decimal Number : %d",decimal);

}

void Hex_to_Oct(char hex[])
{
	int i,len,num=0,power=0,decimal=0,rem[100];
	
	for(i=strlen(hex)-1;i>=0;i--)
	{
		if(hex[i]=='A'||hex[i]=='a')
		{
			num=10;
		}
		else if(hex[i]=='B'||hex[i]=='b')
		{
			num=11;
		}
		else if(hex[i]=='C'||hex[i]=='c')
		{
			num=12;
		}
		else if(hex[i]=='D'||hex[i]=='d')
		{
			num=13;
		}
		else if(hex[i]=='E'||hex[i]=='e')
		{
			num=14;
		}
		else if(hex[i]=='F'||hex[i]=='f')
		{
			num=15;
		}
		else
		//(a[i]>=0 || a[i]<=9)
		{
			num=hex[i]-48;
		}
		
		decimal=decimal+num*pow(16,power);
		power++;
	}
    
    i=0,len=0;
    while(decimal!=0)
	{
		rem[i]=decimal%8;
		decimal=decimal/8;
		i++;
		len++;
	}
	printf("\nEquivalent Octal Number : ");
	for(i=len-1;i>=0;i--)
	{
		printf("%d",rem[i]);
	}
	
}