BASE-CONVERSION Program In C BINARY CONVERSION, OCTAL CONVERSION,HEXA-DECIMAL CONVERSION

BINARY CONVERSION, OCTAL CONVERSION,HEXA-DECIMAL CONVERSION

#include 
#include 
int c,r,f,i[16],j,rw,cl;
void main(void)


   {
    int num,a;
    char ch;
    void bin(int);
    void hex(int);
    void oct(int);
    do

        {
         j=15; rw=0; cl=3;
         for(f=0;f<=j;f++)            
i[f]=0;           
clrscr();           

fflush(stdin);           
printf("\n\n\t\t\t\t BASE-CONVERSION");           
printf("\n\t\t\t\t ===============\n");           
printf("\n\n\t\t 1. BINARY CONVERSION ");           
printf("\n\t\t 2. OCTAL CONVERSION ");           
printf("\n\t\t 3. HEXA-DECIMAL CONVERSION ");           
printf("\n\t\t 4. EXIT ");           
printf("\n\n\t\t\t Enter Ur choice = ");           
scanf("%d",&a);           
fflush(stdin);           
switch(a)                 
{                
case 1:                 
printf("\n\n\t\tEnter a number = ");                 
scanf("%d",&num);                 
fflush(stdin);                 
bin(num);                 
break;                

case 2:                 
printf("\n\n\t\tEnter a number = ");                 
scanf("%d",&num);                 
fflush(stdin);                 
oct(num);                 
break;                

case 3:                 
printf("\n\n\t\tEnter a number = ");                 
scanf("%d",&num);                 
fflush(stdin);                 
hex(num);                 
break;                

case 4:                 
clrscr();                 
exit(0);               
}               

printf("\n\n\n\n\n\t do U want to continue...(y/n) = ");               
fflush(stdin);               
ch=getch();               
fflush(stdin);              
}
while(ch=='y'||ch=='Y');              
clrscr();       
}         
void bin(int no)             
{              
c=no/2;              
r=no%2;              
i[j--]=r;              
if(c<2)                    
{                   
i[j--]=c;                   
printf("\n\n\t\t\t Ans = ");                   
for(f=0;f<=15;f++)                         
{                        
printf("%d",i[f]);                        
if(rw==cl)                              
{                            
printf(" ");                            
cl=cl+4;                            
}                            
rw++;                           
}                          
}                          
else                          
bin(c);                 
  }                     
void oct(int no)                          
{                          
c=no/8;                          
r=no%8;                          

i[j--]=r;                          
if(c<8)                                
{                               
i[j--]=c;                              
 printf("\n\n\t\t\t Ans = ");  
                           
for(f=0;f<=15;f++)                    
               
{             
                     
printf("%d",i[f]);                    
              
if(rw==cl)
                                        
{                                        
printf(" ");                                        
cl=cl+4;                                        
}                                        rw++;                                       }                                      }                                      else                                       oct(c);                                 }                                  void hex(int no)                                       {                                      c=no/16;                                      r=no%16;                                      i[j--]=r;                                      if(c<16) ans = ");                                           for(f=0;f<=15;f++)                                                 {                                                if(i[f]==10)                                                 printf(" rw="="cl)" cl="cl+4;">