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Program that uses this DFA and validates whether an entered string is valid integer or not.

Posted By: Aimee Hughes     Category: C++ Programming     Views: 5327

Generate a DFA to validate an integer data of C Language. Write a C/C++ program that uses this DFA and validates whether an entered string is valid integer or not.

2
state d
0 start 1
1 d 1

Code for Program that uses this DFA and validates whether an entered string is valid integer or not. in C++ Programming

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <ctype.h>
#include <process.h>

int main()
{
    char state = '0';
    char ch = NULL;
    char token[20]={NULL};
    char stt[3][2]= {NULL, '2',
             '0', '1',
             '1', '1'};
    cout<<"Input integer value : ";
    cin>>token;

    for(int i=0; token[i] != NULL; i++)
    {
        if(isdigit(token[i]))
        {
            ch='2';
        }
        else
        {
            printf("Invalide value");
            getchar();
            exit(0);
        }
        for(int j=1; j<3 && ch != stt[0][j]; j++);
        for(int k=1; k<2 && state != stt[k][0]; k++);
        state=stt[k][j];

    }
    printf("Valide value");    
    getchar();
    return 0;
}
  
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Aimee Hughes
Aimee Hughes author of Program that uses this DFA and validates whether an entered string is valid integer or not. is from London, United Kingdom.
 
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