string belongs to the given grammar or not

C Program for implementation of  language given below

E-> TE’

 E’-> +TE’ | epsilon 

T-> FT’

T’-> *FT’  | epsilon

 F-> (E) | i
















#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<process.h>
void e();
void e1();
void t();
void t1();
void f();
int ip=0;
static char s[10];
void main()
{
 char k;
 int i;
 ip=0;
 clrscr();
 printf("enter the string:\n ");
 scanf("%s",s);
 printf("the string is : %s\n",s);
 e();
 if(s[ip]=='$')
 printf("String is accepted ");
 getch();
}
void e()
{
 t();
 e1();
 return;
}
void t()
{
 f();
 t1();
// return;
}
void e1()
{
 if(s[ip]=='+')
 {
 ip++;
  t();
  e1();
 }
 return;
 }
void t1()
{
 if(s[ip]=='*')
 {
 ip++;
  f();
  t1();
 }
 return;
}
void f()
{
 if(s[ip]=='(')
 {
 ip++;
  e();
  if(s[ip]==')')
   ip++;
  else
   printf("error closed paranthesis expected");
 }
 else if(s[ip]=='i')
  ip++;
 else
  printf("id expected ");
 return;
 }