Write a program to check the proper pairing of braces. Your program should have two variables: one to keep track of left braces, say, left_cnt and the other to keep track of right braces, say right_cnt. Both variables should be initialized to zero. Your program should read and print each character in the input file. The appropriate variable should be incremented each time a brace is encountered. If right_cntever exceeds the value of left_cnt , your program should insert the character pair ?? atthat point in the output. After all the characters in the input file have beenprocessed, the two variables left_cnt and right_cnt should have the same value;if not and left_cnt is larger than right_cnt then a message should be printed that includes the number of right braces missing as a series ofthat many }s for example ERROR : Missing right braces: }}}

#include<stdio.h>
#include<math.h>
int main()
{
   int left,right,d;
   char ch;
   left=0;
   right=0;
   d=0;
   FILE *fp;
   fp=fopen("ex.c","r");
   if(fp==NULL)
   {
       printf("\n file unable to create : 1.c");
       exit(1);
   }
   while((ch=fgetc(fp))!=EOF)
   {
       if(ch=='{')
        {
            left++;
        }
        if(ch=='}')
        {
            right++;
        }
        if(right>left)
        {
            printf("error has occured");
            exit(1);
        }

   }
   fclose(fp);
   if(left==right)
   {
       printf("left and right are equal ");
   }
   else
    {
    d=left-right;
   printf("missing right braces = %d",d);
   }

}