C program for Syntax Analyzer

#include

#include

#include

#include

void main()

 {

    int i,j,k=0,count,inc=0,n;

   char name[30],open[30],ch,chh,o[30];

   char op[20]={'=','+','-','*','/','%','^','&','|'};

   clrscr();

   textcolor(3);

   cprintf("--Syntax Analyser--");

   printf("\n");

   printf("\n Enter Syntax");

   printf("\n");

   scanf("%s",name);

   n=strlen(name);

   for(i=0;i    {

      ch=tolower(name[i]);

      for(j=0;j<9;j++)

      {

        if(ch==op[j])

         {

           open[k]=i;

           o[k]=ch;

           k++;

         }

      }

   }

   for(i=0;i    {

      count=open[i];

      ch=tolower(name[count-1]);

      chh=tolower(name[count+1]);

      if(isalpha(ch)&&isalpha(chh)||isdigit(chh))

       ++inc;

     }

   if(k==inc)

  printf("\n %s is a valid syntax",name);

 else

  printf("\n %s is an invalid syntax",name);

  getch();

}