Assessment -2 for EEE

https://goo.gl/forms/8yfVi4nE1EZGo56x1

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;
 }

Sample

Quiz on Datatypes - Conditional Constructs - Looping Constructs

https://goo.gl/forms/CbLGNV2SxTzFMIrP2

Identifying the given number is valid number or not

#include <stdio.h>
#include<string.h>
int main()
{
    char a[500];
    int i,l,c=1,k=0;
    scanf("%s",a);
    l=strlen(a);
    if(a[0]=='+'||a[0]=='-'||(a[0]>='0'&&a[0]<='9'))
    {
        for(i=1;i<l;i++)
        {
            if(a[i]=='.')
            {
             k++;
             if(k>1)
             {
             printf("invalid");
             return 0;
             }
            }
            else if((a[i]>='0'&&a[i]<='9'))
            c++;
            else
            break;
        }
    if(c==l-1)
    printf("valid");
    else
    printf("invalid");
    }
    else
    printf("invalid");
    return 0;
}