C Program to construct a DFA from a regular expression.

#include<conio.h>
#include<strings.h>

void main()
{
int table[2][2],i,j,l,status=0,success;
char input[100];
printf("Program for implmenting DFA of language (a+aa*b)*\n\n\nEnter Input String \n");
table[0][0]=1;
table[0][1]=-1;
table[1][0]=1;
table[1][1]=0;
scanf("%s",input);
l=strlen(input);

for(i=0;i<l;i++)
{
if(input[i]!='a'&&input[i]!='b')
{
printf("Value entered is wrong");
getch();
exit(0);
}
if(input[i]=='a')
status=table[status][0];
else
status=table[status][1];

if(status==-1)
{
printf("String not Accepted by this Language");
break;
}
}
if(i==l)
printf("String Accepted");
getch();
}