/*Title: Write a C program to simulate
lexical analyzer for validating operators.*/

#include<stdio.h>
#include<conio.h>
void main()
{
char s[5];
printf("\n Enter any operator:  ");
gets(s);

switch(s[0])
{

case'>':
     {
         if(s[1]=='\0')
printf("\n Operator name: Greater than \n");
         else if(s[1]=='=' && s[2]=='\0')
printf("\n Operator name: Greater than or equal \n");
         else
printf("\n Not any operator \n");
    break;
          }

case'<':
    {
         if(s[1]=='\0')
printf("\n Operator name: Less than \n");
         else if(s[1]=='=' && s[2]=='\0')
printf("\n Operator name: Less than or equal \n");
         else if(s[1]=='>' && s[2]=='\0')
printf("\n Operator name: Not equal to \n");
         else
printf("\n Not any operator \n");
    break;
          }

case'=':
    {
         if(s[1]=='\0')
printf("\n Operator name: Assignment Operator \n");
         else if(s[1]=='=' && s[2]=='\0')
printf("\n Operator name: Equal to \n");
         else
printf("\n Not any operator \n");
    break;
          }



case'!':
    {
         if(s[1]=='\0')
printf("\n Operator name: Bitwise Not \n");
         else if(s[1]=='=' && s[2]=='\0')
printf("\n Operator name: Not Equal \n");
         else
printf("\n Not any operator \n");
    break;
          }

case'&':
    {
         if(s[1]=='\0')
printf("\n Operator name: Bitwise AND \n");
         else if(s[1]=='&' && s[2]=='\0')
printf("\n Operator name: Logical AND \n");
         else
printf("\n Not any operator \n");
    break;
          }

case'|':
    {
         if(s[1]=='\0')
printf("\n Operator name: Bitwise OR \n");
         else if(s[1]=='|' && s[2]=='\0')
printf("\n Operator name: Logical OR \n");
         else
printf("\n Not any operator \n");
    break;
          }


case'+':
          {
         if(s[1]=='\0')
printf("\n Operator name: Addition operator \n");
         else if(s[1]=='+' && s[2]=='\0')
printf("\n Increment Operator \n");
         else
printf("\n Not any operator \n");
    break;
          }


case'-':
     {
         if(s[1]=='\0')
printf("\n Operator name: Subtraction operator \n");
         else if(s[1]=='-' && s[2]=='\0')
printf("\n Operator name: Decrement Operator \n");
         else
printf("\n Not any operator \n");
    break;
          }

case'*':
     {
         if(s[1]=='\0')
printf("\n Operator name: Multiplication Operator \n ");
         else
printf("\n Not any operator \n");
    break;
          }

case'/':
     {
         if(s[1]=='\0')
printf("\n Operator name: Division Operator \n");
         else
printf("\n Not any operator \n");
    break;
          }


case'%':
    {
         if(s[1]=='\0') printf("\n Modulus Operator \n");
         else printf("\n Not any operator \n");
       break;
          }

default:
printf("\n Not an operator \n");
}
}