Adpratical2

#include <stdio.h>
int main()
{
    char input[100],stack[100];
    int top=0,i;
    stack[0]='Z';
    printf("Enter string of 0's and 1's: ");
    scanf("%s",input);
    for(i=0;input[i]!='\0';i++)
    {
        if(input[i]=='0')
        {
            if(stack[top]=='1') top--;
            else stack[++top]='0';
        }
        else if(input[i]=='1')
        {
            if(stack[top]=='0') top--;
            else stack[++top]='1';
        }
        else
        {
            printf("Invalid input!\n");
            printf("Adipt Shah\n");
            return 0;
        }
    }
    if(top==0)
    {
        printf("String Accepted by PDA.\n");
        printf("Remaining stack: Z\n");
        printf("Final State: qf\n");
        printf("Adipt Shah\n");
    }
    else
    {
        printf("String Rejected by PDA.\n");
        printf("Remaining stack: ");
        for(i=0;i<=top;i++) printf("%c ",stack[i]);
        printf("\nAdipt Shah\n");
    }
    return 0;
}

#include <stdio.h>
#include <string.h>

int main()
{
    char s[100],stack[100];
    int top=-1,i,c,accept=1;
    printf("Enter string: ");
    scanf("%s",s);
    c=strchr(s,'c')-s;
    if(c<0)
    {
        printf("Rejected\nAdipt Shah\n");
        return 0;
    }
    for(i=0;i<c;i++) stack[++top]=s[i];
    for(i=c+1;i<strlen(s);i++)
    {
        if(top<0||stack[top--]!=s[i])
        {
            accept=0;
            break;
        }
    }
    if(top!=-1) accept=0;
    if(accept)
        printf("Accepted\nAdipt Shah\n");
    else
        printf("Rejected\nAdipt Shah\n");
    printf("Remaining stack: ");
    for(i=0;i<=top;i++) printf("%c ",stack[i]);
    return 0;
}

#include <stdio.h>
#include <string.h>
int main()
{
    char s[100],stack[100];
    int top=-1,i,c,accept=1;
    printf("Enter string: ");
    scanf("%s",s);
    c=strchr(s,'c')-s;
    if(c<0)
    {
        printf("Rejected\nAdipt Shah\n");
        return 0;
    }
    for(i=0;i<c;i++) stack[++top]=s[i];
    for(i=c+1;i<strlen(s);i++)
    {
        if(top<0||stack[top--]!=s[i])
        {
            accept=0;
            break;
        }
    }
    if(top!=-1) accept=0;
    if(accept)
        printf("Accepted - Stack is EMPTY\nAdipt Shah\n");
    else
        printf("Rejected - Stack is NOT EMPTY\nAdipt Shah\n");
    return 0;
}